With so many people asking about this lovely air shotgun ( actually co2 ) I thought it would be nice if I could gather my experience on one spot. I have owned mine for 5 years know and it was not until recently that I found out some forums and on these they were asking a lot of questions. I have now collected a lot of major questions and answers along with my own experience. The Trapmaster were made between 1968-71, and even today more then 35 years later you can still find an example that will hold co2 and shoot like a queen. Trapmaster was sold in a box containing both a clay launcher, table, clays, reloading box etc. It was introduced to the market as a training tool. Additional reading can be found in Airgun Digest 3rd edition, US Airgun Magazine Jan/Feb/Mar 1995, just to name a few.
Any pictures of customized Trapmaster accessories, stories etc mail me
Download a exploded view of Trapmaster
Source for new shootshells
PHOXX Mfg.
P.O. Box 716
200 S. Broadway
Linton, North Dakota 58552
Email:
phoxbek@daktel.com
Manufacture of .380 ga.
Shotshells for Crosman 1100 Trapmaster
15/8-07 Look at this link to see real close what a Trapmaster with a 80 grain roundball is capable of.
Many thanks Bill.
21/6 2007 Picture added Ron Sauls, And his Crosman 1100 .25 caliber gun.
15/6 2007 More custom work from Peter, adding a nice grey paint that really puts the 1100 to a different level.
6/5 2007 More pictures added - Among them are a new creation from Peter Ruut a very nice one. Also a wood woork from a Remington 1100.
24/3-2007
Also new pictures, original box, added to the library ( see the end of this page)
Along with the plastic valve, I changed the spring to a stronger one. With trial and error I changed the position of the power selector. This is a delicate work, to much pressure and the valve can’t hold the hammer, to loose and I loose power. I have been thinking of putting the original spring back, and this day I had some time over. I stripped the gun down, but before changing the spring I tried to tighten the power selector. This made the valve to letting co2 escape, there was too much pressure on the valve after firing one shot. With selector at position as before I put the original spring back in and filed the gun up.
The Trapmaster is a little bit itchy before settling down. I tried a numbers of filling, and the best I got was 11, don’t let this number fool you because this was the hardest hitting H & N .378 round ball I so far shoot.
With 490 fps and 80 grains/5 gram this is 42 ft-Ibs. This fill must have been a magic one, tried a few more but did never come close to this speed. All test was indoors at around 22 Celsius.
I cant wait to see what a warm day outside can produce.
When doing the changes I had opportunity to weigh the valve, the original made of brass was a heavy hitter of 32 grams, and the baby plastic only 6 grams. All the difference in speed is the delicate tuning between the power of the hammer, stronger/weaker spring in the body valve, weight of the valve etc. More testing will be undertaken, but the figures that is written in numerous airgun books, magazines, saying that the Trapmaster can produce around 600-650, ( with a heavy load of around 80 grains) is far from what I have achieved so far.
Measure speed is one thing, but when you can see the difference in a splatted ball its more dramatic. At top shows several .375 Hornady round balls shoot at a steel plate at 465 fps, the diameter is 2,5 cm and 2 mm thin. As I said before I got 490 with a H & N .378, this shoot was the only at this speed, and I did not shoot at a steel plate. The highest speed on the shoot is 495 fps this is a 73 grains load.
If any of you out there have idée to gain more power plz let me know.
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First of all I would like to thank Jim Kramer from the US, for sending me these nice slugs.
The figures shown was before I changed back the original spring. New tests will come soon.
Also figures and patterns of the intended role as a shotgun. These test has to be done outside at longer ranges, and of course the days must be wormer. The most efficient slug of these so far is the both lightest and smallest in length. Accuracy test is planned when the sun says hello!. So far
Slugs
509 fps/4,15 gram
438 fps/ 6,25 gram whole base in bottom
446 fps 5,13 gram
396 fps 6,5 gram
388 fps 6,84 gram
328 fps 8,97 gram
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10/3-2007
I did some more shooting and here are the results so far.
Hornady roundball .375 with plastic wad 439 fps. This is 34 ft-Ibs
Handler & Natherman .378 with plastic wad 447 fps. This shoot is the only one that got clean trough a 1,5 mm thick aluminium plate. This shoot was a 35 ft-Ibs
Steel ball .375, 478 fps. Weight 55 grains/3,5 gram. This one did not penetrate the aluminium plate. 27 ft-Ibs.
To the smaller homemade bullets I got impressive 595 fps with a crow magnum with a weight of 42 grains/ 2,7 gram. 33 ft-Ibs
With a steel arrow to blowguns I got 599 fps, 26 ft-Ibs weight 33 grains, 2,1 gram.
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8/3-2007
New projectiles to Trapmaster can bee seen here. I made a mould to fit the .380 bore and put both .177, .22, .25, and blow darts arrow. I will do some testing with these. More to come
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8/3-2007
I finally got my hands on a Chronograph and did some indoor testing.
The .375 Hornady round ball left the barrel of about 400-406 fp/s. Nest the H&N r.378 round ball went up to 423-425 fps. The ball weight is around 80 Grains. And so far I have managed to get out 31 ft-Ibs. Seems that the larger .378 is tighter and not letting any co2 escape.
With standard shoot load 73 grains the speed reached 445 fps. And this equal to 32 ft-Ibs. All the test was indoor, at around 22 degrees Celsius. When summer comes with the hot weather I will do some more testing. The goal is to take the Trapmaster up to 500 fps with a 80 grain round ball. So far I have files the sear and changed the valve to a plastic one. I plan to change back the original spring, this one is much weaker and should do good. The fill of 32 gram co2 was enough for 16 shoots, this means that 2 gram of pure co2 is used for each shoot. Before the mod only 1 gram was used.
Pictures of Trev´s .22 Trapmaster added 22/2-2007
New pictures added of a Goldplated version- Only six of these gold-plated 1100 models were ever made by Crosman. Stuff like this came out of the prototype/model shop. By DT Fletcher 21/2-2007
More info of the rifled 7 mm barreled version of the now famous Trapmaster- New pictures added at the bottom 21/2- 2007
Lists Item No. 1370 as:
"Crosman 1100 custom built 7mm CO2 rifle. Rebuilt by advanced airgun
hobbyist-machinist. Fitted with 7mm high power rifle barrel with ventilated rib,
open iron sights, ramp front sight. All metal and woodwork excellent except
custom barrel has not received it's final polish and bluing. Complete with Lee
7mm round ball bullet mold and 10 beautiful, lathe built, heavy brass cartridge
tubes which each accept a 7mm lead ball. A high power delight. US$139.50"
The year for this is suppose to be 1980. Only a few was made
Also info of a .22 version- Sharp inventor and designer, Kensuke Chiba.He had a great interest in the workings of Crosman guns-in fact he was the first bloke to put a .22 barrel on an 1100. The original barrel was shortened and an insert was fitted. In it,a stout washer has been fitted to the CO2 port so you simply load into the breech-end of the barrel,close it against the port seal and fire.The ejector mechanism has been removed-not necessary. This text was taken from Crosman/Vintage forum and was written by Trevor Adams.
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With the set that was for sale in the late 1968 you find a skeet trap, some “clays” made of plastic and different colours of shoot shells. A metal box in the package included a “loading” tool, size #4 #6 #8 of lead balls and plastic wads. A very great addition to your Trapmaster. 17/2 2007
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Well you have to have the manual to this co2 shotgun/big bore 16/2 2007 Manual
The Trapmaster co2 bulk-fill- the end ( 9/2 2007)
Finally I got my Trapmaster to work with a bulk-fill as it did with bulbs. But it has been a long way to go with a lot of trial and error. The first thing was to get a large bottle of co2, not the easiest way were I live it seemed, but I got one. Next steep was to get a connection to my paintball bottle, this was no trouble. Finally to fill the paintball bottle you have to cool it down, if you leave it in the freezer for about 30 min you should be able to get a complete fill. In this case a 20 oz bottle should way 926 gram empty, and a complete fill 1486 gram a difference of 560 gram of pure co2 This is 28 gram per 1 oz. Total 20 oz equals 560 gram co2. With the paintball on a scale while filling its very easy, and no chance of overfilling. The trouble for me started when I wanted to fill the Trapmaster, it seems that it has too bee a fill of around 24 gram. At this amount of co2 the Trapmaster seems to work best. It seemed that I was not able to get a complete fill, (at the end before I managed to get the larger bottle I was only getting gas and no liquid from the paintball) I managed to fill between 12 to 16 gram, but this was not enough to withstand more then one or two shoots, these were not as powerful as before. This I think has to do with the power selector that is on high and the tension is real hard, therefore the hammer has more power on the valve. Seems it’s a delicate thing to have the right pressure to the power selector versus the spring in the valve. I cooled the Trapmaster down simply by putting it outside, and I managed to get a good fill of 27 gram, I waited two hours and then shoot but the .375 did not flatten as well with two bulbs.
It seemed that 2 hours was not enough to warm up the Trapmaster. Then I managed to destroy the threads on the adapter so when trying to fill co2 escaped. I cut the bad threads, but missed a sharp edge this opened up the rubber in the fill cap. When filling a lot of co2 escaped and no good fill. Simply by putting a o-ring between the paintball bottle and the fill cap solved this. And today 9 February 2007 I fixed all this and filled the Trapmaster with the highest amount of co2 so far 32 grams. And after I test shoot it on a steel plate there seems to be the same result as with bulbs. Note also that I have the new plastic valve in, with a chronograph I should know if there is any increase of speed. This could be so small that it won’t show up on the splated round balls. Se the splatology by Tom Gaylord http://www.airgunwriter.com/splatology.html But for now I am glad that I managed to get them splated like before with the bulbs. A impressive 2,2-2,3 cm in diameter, and only 2,5 mm thick. This is near the same to a Swedish Krona. Would like to thank all that has contributed with idée’s when I was asking a lot of this on different forum. And as always I would like to hear from other Trapmaster owners and shooters of their experience and results.
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Bulkfillling the Trapmaster
Finally i got my hands on a large co2 bottle. With this I can fill up my paintball 20 oz bottle. So far so good.
To get a good fill from the paintball tank to the Trapmaster you have to cool down the Trap. I did this simply by put the trap outside in the cold. For the first time I got a very good fill 27 gram. When using bulbs you get 24 gram. But still with the same and over the amount the Trapmaster lacks the power that I am getting from 2, 12 grams bulbs. I have tried in many ways to fill but its still shoots the hardest with bulbs. I think the smaller bulbs have some gain in power. Any advice, idée’s is more then welcomed.
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Here is a step to step info on how to replace a valve. Before this mod i have changed the spring to a harder one, inside the valve, the spring guide was removed, and the sear has been cut. This to prevent the hammer strike on it, therefore more power because the valve keeps open longer. The stronger spring I put in the valve, was not a good idée ( if harder the less time the valve will keep open, but whit the original spring it was to soft to hold against the tension of the power selector), but I have balanced the harder spring whit the power selector. I had to open it up once again to change the original spring. Due to lack of co2 I will update the shoot testing in the future. Click on pictures below to make them larger, under each picture their is additional text.
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Crosman 1100 Trapmaster
First step is to make sure its unloaded and that all the co2 is gone. Then unscrew the end cap, otherwise you can’t get the for end of. Then unscrew the back cap to the stock, inside it’s a long bolt that is loosen and the stock can now be removed.
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As you know I am a great fan of the Crosman 1100
Trapmaster and have been testing a lot of different ammo such as round balls,
slug, and size of shot. Also modification to press some more fps out. Shooting
with red dot sight at fair long distance. I have used the smaller co2 bulbs (12
gram) and got out 24 shots on high power. With a large co2 bottle that I fill the
Trapmastern with, I can not get as many shoots, its very tricky to get a proper
bulk fill. The Trapmaster is very sensitive.
To my point I shoot .375 balls on a steel plate and these flatten real good,
then I shot .378 balls at the same distance and speed, but they came out
differently. It must be that the led components is different and that the .375
are much more softer then the .378.
The .375 is 2,3 cm all around these are more equally flatten
The .378 is between 18,5 to 2 cm.
We have all read the splatlogy of Gary Barnes, this show that you can fairly se
which speed a bullet/round ball have when you se how much its flatten, but as you
se of my test this can vary depending on the hardness /softness of the ball.
Well, once again I have tried to hot up my Trapmaster,
this time I took it apart and put a file to the sear, I have done this before
but I took of a little bit more this time. When finished I filled it up with the
bulkfill, whoomp the 80 grain (5gram) .375 round ball from Hornady hit the
steel plate, hmm the ball was not that all flatten as it use to be. Shot number
two ventilated all the co2. Hmm i thought I had cut a little to much, I tried to
loser the tension of the hammer spring, put the power selection on low, but
nothing worked. I was getting a bit frustrated, think,think, what has happened?
I took It apart 3 times testing different theories. But still the #”¤%& co2
escaped like a fart in the wind. Finally I tried the smaller bulbs (12 gram) and
the gun shoot like a dream. I am not so familiar with the bulkfill, but it
seemed that it was only gas left.
Hunting with the Trapmaster, with the .375 .378 round ball these will take hare and even fox up to about 20 meters or so and anything smaller.
When we come to the shoots, it’s a different story.
If we take plastic shell 2 cm in length with the plastic wad at the rear, and a
3 mm cork at the other end, I can fill it with 20 3,5 mm lead shoot ( about 80
grain/ 5 gram) With number #6, 2,75 mm and 30 of them 57 grain/3,5 gram. In a
aluminum shell 2,3 cm in length I can get 30, 3,5 mm shoots, I get 120
grain/7,5 gram. With #6 (2,75) I get 40, 76 grain/ 4,8 gram.
I don’t have any way to measure the speed of my Trapmaster, even though this is
modded and do a little more then a standard one, we still calculate with around
400 fps/120 m/s.
If we take the red shell with 20 3,5 mm, we get 27 foot-pound/36 Joule, and with
the #6 shoots we get around 16 foot-pound/ 22 Joule. I we take the aluminum shells we now get
38 foot-pound/ 51 Joule, and with the #6 we get 27 foot-pound/36 Joule. Note
these figures are as close I can get and vary a little up and down. Conclusion
if you managed to keep the shoots in a fairly close circle at 12-15 meters it
has the power to drop dove, rat, mice, jackdaw, magpie, and other quarry at these
sizes With winter around the corner and co2 don’t like the cold you have to wait
to the summer for more testing, with shoots at these distances.
Below a few questions that I have asked on forums and with answers that followed.
Questions
Finally i got
my connection and paintball tank to hook up on my Trapmaster. I have changed the
spring in the valve and filed the sear , but no sine of increasing power. The
thing with the paintball attached is that on high power shooting, the valves
don’t close, i have to manually push the "hammer" forward, this don’t exist when
the hose and paintball is disconnected. Anyone know why? On low power the .375
round balls is flatten out to 2 cm, and the thickness is around 3 mm. On high
power they flatten to 2,2 cm and ca 2,2 mm thick. As you can see the deferens is
not that high. I do not have a chronograph so i don’t no the velocity, but these
figures was done before modding, and the velocity for a standard Trapmaster is
around 400 fps/ around 120 m/s. These figures are the same after the "modding",
and the hose and paintball tank attached.
All shoots take from around 5 m on a steel plate. Also the best material to use
on the shells is cork, just buy some cork and a cutter in 10 mm, and you have
perfectly round wads to use on the shoot shells.
If you have modded the Trapmaster in another way and gained a higher velocity,
plz let me know. also other stuff.
Answer
If it solves
the problem, then you know to try different length and power springs, until you
find one that adds power without losing function.
To add power, you need to add airflow to the shell.
you should angle the port and smooth off all surfaces that the co2 passes over
from the valve to the shell.
Also remove any mass inside the valve that is unnecessary without losing
strength.( co2 is not as strong as PCP but can still be dangerous.) this will
increase the volume of the valve and in turn add power to the gun.
The valve opens for set distance for a preset time.
(not easily changeable) so the only way to add airflow (co2 flow)is to increase
the opening that the gas flows through, "Porting"
Good luck with your mods. I hope this helped.
( I am Fairly new to modding myself so If anyone has more to add, or disagrees
with me, Please add your comments.)
David.
Question
Se my other
inlay on Trapmaster below.
I filled up my trapmaster with no problem yesterday, but to hook of the hose, i
had to unscrew the top witch are connected with the paintball tank, because when
the hose was hooked up, and the on/off valve closed, and for that thing open, it
seemed that it did not had the pressure to keep my valve closed on high power. I
therefore unscrewed the connector to the paintball tank, and let the co2 escape
inside the hose and i was able to hook of the hose from the rifle. I could now
shoot without the paintball/hose attached. I tried this again today, and co2 got
away all over the place, the o-ring was busted, i replaced it, but could not
unhook the hose to the rifle without that co2 escaped. It seems that if i want
to fill up my rifle this way without to have it attracted to my paintball tank i
have to live whit the fact that some co2 escapes, ( the co2 still in the hose,
when the paintball bottle is off) the pressure in it make it impossible to
disconnect the hose from the rifle. I will order a connector that don’t use a
hose, this one is attached directly to my adapter.
If any has a ide plz mail
Answer
If i understood correctly pressure in the hose is making it impossible to disconnect...in that case it seems like you need a bleed valve to drain the hose.
Question
I have a
Crosman Trapmaster 1100 shotgun, and using 2 powerlets. I tested too use only
one, and the power dropped, i thought that the pressure was the same with one or
two powerlets, and that more then one just gave more shoot and not more power.
I will put on a hose and fill from a paintball tank, the question is now if i do
this, does the power increase also. And if i shoot with the hose attached would
this high the pressure even more?
Answer
is that there is less pre-warmed gas available for the shot, Yes hooking up the paint ball bottle should give a little bit better performance than shooting with two carts, for the same reason, more pre-warmed gas for the shot. HTH. james
Question
I bought a
adapter from USA and i cant find any connections to fit to the adapter, with a
hose to a co2 tank, so i can fill up my Crosman 1100 Trapmaster.
If anyone could help me plz mail or write Looking for connection from adapter
with a hose to a Co2 tube.
Answer
The right
connector is threaded 1/8 NPT. I just received a complete bulk fill kit from one
of the forum members (JimC) today. It included a 1/8 NPT QD coupling a high
pressure coiled hose and an adapter for my paintball tank all intended for
bulking my QB-78. He even took the effort sending it over to Europe
(Netherlands).
He told me he had a few more sets and he's very reasonable with prices. Drop me
an email as I don't want to post his email address on the forum.
Mark
This I asked on forums
just pumped 1500 psi into my Qb78 and everything worked fine, and i wonder if there is anyone who
have tried to fill the Crosman 1100 Trapmaster with air at around these
pressures. With so many of you out there experimenting with this plz comment. Is
it safe?.
Merry Christmas and were is the SNOW!!!!!!!!!!!!!!!!
here are some answers
Hi Kenfi,
excellent the QB78 works great with HPA.
If you're going to experiment the CR1100, perhaps you should start
at 1000 psi or 1200 psi first before going any further.
the valve in the 1100 is big ,you may not get any better speed with hpa . i would think 1000-1400 psi should be ok ( never tried it myself ) but the higher the air pressure the heavier the spring must be . make sure the copper tubing is not jam'd or rotted anywhere .
This i tested
Thanks for the comments
guys.
I tested to pressure the Trapmaster to 1400 psi/90 bar but as you see this valve
was not constructed to be use on air. But if any of you have any ides to get it
working plz let me know. Its a lot easier/ and economically for me to pump up the
gun with pure air
See picture how it turned out
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Here are some ammunition in form of round balls, and shoots.
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Alternative ammunition
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Here are some test shoots taken during last summer.
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Here are a few modified Trapmaster along with accessories.
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