I have a question. I have a Para USA GI Expert, and i just shot a few round of winchester 185 gr FMJ target/ range rounds, and all of the spent shell casings had powder marks on the side. May this be a problem with my handgun, or is it the ammo. I have read about this problem with hk handguns, but people suggest it is the ammo.
Powder marks on the empty case means blow-by; hot gasses escaping past the mouth of the cartridge. Typically the cartridge expands slightly under pressure, sealing the chamber & preventing this That's why they need to be re-sized for reloading. This can happen with low powder charges not developing enough pressure, worn or damaged chambers which go out of spec, out of spec ammo, and (I think) cartridge cases which have been reloaded too many times. In any case I suggest its time to have a gunsmith look at it. Any gun smiths out there who'd care to enlighten us?
P.S. I think it could also be caused from a weak recoil spring causing it to unlock too soon. Where's our gunsmith? I'd really like to know about this.
If you have a micrometer measure the spent shell case. If it isn't round the gun chamber could be bad. My best guess would be the pressure is too low. Try some different ammo.
I have a question. I have a Para USA GI Expert, and i just shot a few round of winchester 185 gr FMJ target/ range rounds, and all of the spent shell casings had powder marks on the side. May this be a problem with my handgun, or is it the ammo. I have read about this problem with hk handguns, but people suggest it is the ammo.
Sounds like an ammunition issue to me. Fiddling with springs is NOT going to change when the bullet pulls free of the case and enters the barrel.
It's just blow by. The round isn't getting full expansion of the brass meaning the case isn't conforming fully to the chamber walls before the bullet is entering the barrel. It happens with light bullets and/or low velocities and 185gr target loads combine both.
If it was a reload, I'd suggest trying a heavier crimp and, if that fails, going to a heavier bullet or increasing the powder charge. Considering how light the load you are shooting is (185gr is LIGHT for a .45), I'd suggest trying a 230gr round to see if it continues.
Or
You can just keep shooting what you are shooting. All that is going to happen is you gun will be dirtier than usual.
I agree. A heavier load will tell you whether you have a chamber issue or not. If a heavier load doesn't solve your problem, mark a round with a felt tip pen on one side. Load the into the chamber with the mark up and fire the gun. The powder streaking on the spent case should tell you where to look for problems in relation to your chamber.