Hey guys & girls. My Crosman 454 CO2 pistol wasn't sealing the cartridges correctly (letting all the air out upon piercing) so I bought a seal kit and swapped out the valve and o-rings. Put it all back together, popped in a fresh CO2 cartridge (it seemed to hold. Could not hear any air escaping), and loaded it up with BBs. Upon firing it, I could see gas coming out of the barrel, but did not hit the target. Checked and saw after multiple trigger pulls, the BBs are not moving the loading lever on the top of the gun. Pulled 15-20 more times, and got nothing out of the barrel except gas. BBs are not moving thru the gun.
I pulled it apart again just now, looking for something obvious, and cannot find anything. Anyone have one of these and have ideas? I'm stumped.
Yes to the amount of gas coming out (real loud and strong) and yes to the c-clip on the end of the barrel. The barrel does have a few small (less than 1/8") splits or cuts in the barrel, AHEAD of the c-clip (the .5" section of the barrel in front of the c-clip) but many I've seen have that.
I have had 454s in the past where BBs would bind in the magazine. Usually a quick snap of the follower fixed the problem. One of mine was probably overtightened on reassembly (prior to my ownership.) I fixed it with the extremely low tech solution of spreading the slot in the top with a straight blade screwdriver. I've also polished the inside surfaces of the magazine with a Q-tip and white rouge, then burnished in moly.
Check your magazine for BBs binding. It might be that simple.
I backed off the cap head set screw that holds the barrel half a turn. I think I had it too tight, not letting the BBs into the barrel. I could get a shot off occasionally, but I'm guessing a BB would get stuck, and only exit the barrel once I put 10-12 trigger pulls to it, which to me means that once I put enough gas behind it, it would squeeze past. That barrel is *technically* metal, but it's compressible. Also, I had trouble with the trigger not coming back to starting position regularly. After each shot I had to really play with it in order to get it to drop again. A little grease on the trigger metal arm helped with that too.
I just put 30-40 BBs into the target box in the garage rapidly and it worked. Will run a full cartridge thru it and see how it holds up. Thanks for all the tips, people!
Glad you got it up and running. They are, as I said, my favorite semi-auto BB pistol. Overtightening can be a problem on pot-metal guns. They're kinda like steam-engines; you get a feel for what's enough, and not too much. Once you get them all just right, including the mating screws on the frame itself, back everything off and add a VERY little low-torque locktite and retighten to just where you were. Let it sit overnight, and you're good for several more years.
Hmmm...the BB advancement thing seems to be fixed, and the CO2 seal seems to be fixed, but...the trigger sticks (and sticks hard) after every other pull. Doesn't come back easily either. If you fire rapidly, it's better, but the "aim slowly and shoot with purpose" thing sticks it at the rear of the trigger guard nearly every time. I pulled it apart (again) and....the springs are routed exactly the same way there were when I opened it for the first time. Ideas? Would love to fix this.