I've been loading up on Lake City XM885 green tip penetrators with some good deals lately. I'd rather not shoot 'em up when I go to the range with some new AR furniture I've got coming in the magic brown truck (pics soon...). Silver Bear makes an inexpensive 62gr HPBT. Would the ballistics be similar enough to zero-in the scope and be pretty dialed in with the steel core bullets. The Silver Bears are only 25 cents a pop right now at Cheaper than Dirt. Or should I just shoot the ammo I'm going to use if SHTF? I don't think 55 grain FMJ's would give nearly the ballistics that I am looking for. But what do I know?