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I am having an issue with my Iver Johnson M1 Carbine. It is a 91 production 50th anniversary edition. When I fire it the first round fires fine. The second round does not fire but has a light primer strike mark on the primer. If I pull the magazine, clear, and recharge it fires fine for one round again, then another light strike. If anyone has any advice as to where I should start I am all ears!
Thanks!
Michael
Does the hammer cock fully or is it down on the second round?
Does the bolt fully close on the second round? Do not try to fire this until you know it is fully in battery!!!
Sounds like a weak recoil spring to me, or maybe a weak Hammer spring. The commenter above me is correct, make sure it is in battery before firing the second shot by just smacking the slide handle with your hand a little bit. That is what I do to ensure it is fully forward. I'm no expert and I'm not familiar with Iver Johnson's, but the operating principles are exactly the same I would imagine. First easy cheap fix attempt would be a new recoil spring in my opinion. I would also disassemble the bolt and clean it real good and make sure you're extractor is working properly to snap over the rim like it should. Carbine bolts tend to get very gummy and dirty and will prevent the extractor from working properly if not cleaned and maintained. also make sure your chamber is very clean.hth
They're built like the others...so same springs. Maybe a new set of USGI springs will do it? Maybe someone added a Wolff extractor spring and it's not riding over the rim during feeding. Hard to guess from here. If we watched you, we'd be able to help though.Quote:
Originally Posted by mikenac
As others have said above, start with a good deep cleaning of the bolt and trigger group in case it is just a problem due to dirty part(s) not operating correctly. Your next step would be springs (as mentioned above) since they are also your cheapest option. Just as an afterthought, have you tried a different brand/lot of ammo? This would eliminate ammo as the problem and confirm it is the gun. Hope that helps and good luck!!
If the bolt is not closing completely, that will leave a small dimple in the primer. The likely culprit is not the hammer spring or the recoil spring but rather the extractor/extractor spring. Pull the bolt and give the extractor a thorough cleaning. If the spring is grunged up the extractor doesn't ride over the cartridge rim leaving the bolt no quite closed. After you fire the first round stop and give the cocking handle a slight bump forward with you hand. If it snaps into battery, then that is most likely your problem.
Are you using armscor ammo by any chance?
Yes, Jimb is right on, cleaning everything first before replacing anything is the right way to go about it. If that doesn't solve it, next move on to the springs.also, clean The extractor itself thoroughly ,especially under the lip where carbon builds up.hth