FIRST thing to do, is make sure it is thoroughly cleaned of any and all crud, build-up, hardened oil, dirt, firing residue, etc. Then try several types/brands of ammunition - if jamming continues after THOROUGH cleaning and with any and all ammo - take it to a gunsmith.
I would have it looked at by a compitent gunsmith.
Clean it first, then make sure the extractor's in good shape.
Ace registers have a jamming fix button that will clear it out.
The problem with the ar-7 jamming is not the rifle but it has to do with the magazine. Here is how to fix the problem.Polish or fine sand the feeding ramp on the magazine to bare metal and lightly lubricate with gun greese.Lubricate after every shooting session and you will never have another jam.
The answer lies in adjusting the primary & secondary shell stops.
It depends on the model and what is wrong with it.
Do not attempt to "fix" ammunition. Dispose of it properly. Ask your local police for help.
It all depends on what is wrong with it.
Take it to a gunmsith.
See the link below.
You need the services of a good gunsmith
Leave this to a gunsmith