well i guess this is a question about magazines in general....so after getting my SA milspec this christmas i used the loaded coupon to order 5 extra SA seven rounders, after about 4 weeks they came in and i got to give them a run through. all was good when i started( i used the mag that came with the gun) then as soon as i popped in the first new mag i had a jam. this was just racking the slide. i manually removed the jammed bullet and tried again to the same result. so i just grabbed another mag and it worked fine. i then noticed that the "bad" mag had an extra hole in the side( the bullet count holes). now i don't know much of anything about taking apart mags so i have no clue what is going on but i will be sending it back for a new one.
so does anyone have any idea as to what happened? it is definetely a seven round mag but with an extra hole....maybe its just a bad egg in the bunch?