I have been thinking about geting in to reloading ammo. And have a few questions, how many times can you reuse brass? I know they make case trimmers, and you must mesure to be sure they fall within specs,but is their a definate life range? Also what are the dissadvantages of LRN (lead round nose) vs FMJ (full metal jacket) for practise ammo? It would seem that the LRN would cause extra fouling in the rifleing, as the surface is softer. thanks!