howdy all, new member and first post. I've aquired a Win. mod. 100 in .308. Old and rugged but reasonably clean. After finding a reproduction mag for it (OUCH) and solving an extraction problem(fouled/scratched chamber)I now am at the last minor booboo the previous owners inflicted on it. The bolt will not remain open after the last round is fired or when hand cycled unless the rear of the mag is pushed up slightly to engage the lower bolt lug. I think someone got rough with the trigger asembly(attempted to remove it from the bottom) and bent the lower rails slightly downward at the rear of the asem. as they do not run parallel to the operating rods directly above them,especially at the rear of the trig.asem. If my assumption is correct, dose anyone have an idea of how i might straighten them? Or might it be possible/eaiser to brase or silver solder the rear notch of the mag. catch slot a bit and hand file it to give the additional rear lift needed. Please excuse the long winded account but i try to give any info that might be useful for anyone that might respond. Thanks in adv. DrBob762.