I have been working on a Crosman 2300t for my grandson, upgraded to a 1701p trigger and then noticed the gun barely pierces the cartridge, only after several "dry" firings and then sounds weak. I swapped back to the original trigger and see the same thing, so do not think the trigger is involved. Would a stronger hammer spring help, or something in the valve/piercing unit?
Tuning Barely pierced CO2 cartridge
- Thread starter jkingrph
- Start date
I've experienced the same thing. I repointed the pointed end of the valve and a little tighter on the end cap.
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Having had CO2 carts stick in two different pistols, I have taken all apart and actually polished the tip of piercing pins to a mirror finish on a hard felt wheel, not changing angle or length, I did this one before proceeding as with all others. If by end cap,you mean the cap that holds the cart in, it is very hand tight. I don't care to use a screwdriver or coin to force it tighter.
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The piercing pin may need some attention they sometimes do but sometimes its the cap on the carts that is the problem. To hard or to thick of material makes them difficult to pierce. I had to buy from a different vendor once because of this problem. You could put a bit heavier hammer spring in it if needed as well. Also make sure your tube is clean, oiled lightly and free of burrs so the hammer is not slowed as it travels.
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I've experienced the same thing. I repointed the pointed end of the valve and a little tighter on the end cap.
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Like I said earlier the pin is polished and is sharp. I tried carts from Crosman and Red Rock, both of which work fine in other guns. The end cap is very tight, finger tight to start with, I really don't want to hog down on it with a screwdriver. When I remove a cart it appears to have barely been pierced as compared to big holes in carts from other guns. It also sounds rather anemic when firing like it's not getting enough gas.
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If you tighten it down too tight it will stop the piercing pin from doing its job as it crushes the seal inward.
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I just did an experiment. Removed the cart and installed a new one , barely finger tight plus 1/4 turn. It took 9 shots to pierce the cart. I then picked up the one I had removed and found it was still "passing gas" and continued to do so for better than four more minutes. That tells how tiny of a hole the pin was making.
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I think you've got a hammer spring that's weaker than factory spec. Try shimming it with a tiny washer or two in the end cap or get a few replacement springs of various strengths. You'll find one that will pierce the cartridge better. By it's nature it's going to strike your hammer harder and add velocity though. Not really a bad thing.
Glenn in Texas
Glenn in Texas
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G
Guest
Guest
Penny Is your friend. That is how children have been solving that problem for many years. Put one under the cartridge.
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I finally got the parts in yesterday. I may have gone a bit far, but this is going to be a mostly plinking gun for my grandson and son so wanted to soup it up a bit and succeeded. First thing was to install a Boss RP valve after polishing the piercing pin, then a polished stainles hammer made for the 1701p trigger group along with an extra power hammer spring and a Magnum Airpower compact adjuster. I had fits getting the hammer pin to stay in place, don't know why because I had done several with no problems but this one was a pain, it kept slipping and making the hammer jam, but finally got everything lined up and working. I was surprised when it actually fired the first shot vs the second as on most of my other 22xx types. I did at the last discover that the rear trigger housing screw was a little long and contacting the hammer spring, which may have been my problem all along. Prior to all this work it was only delivering about 290fps, and afterwards it is right at 590, so a big improvement. It may use more gas and give fewer shots per cart but will be more fun as a plinker. The day is already getting rather hot here so will get it out tomorrow and re zero as to do all this the LPA sight has to be removed. I will probably go ahead and use that cart and see how it performs for a short test.
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