BT's packaged 100 per box, in 243 (95 gr) on up are the old BT's just a varmint bullet in heavier weights. those packaged 50 per box are a nosler solid base boattail with a polymer tip. I've had 2 of the older BT's suffer jacket core separations and didn't exit. these were out of around 50 deer and a couple bear shot with them. there is absolutely no better deer round than a .257 115 gr NBT (the new ones) at 3000 fps, haven't had a deer stop one yet.
RR
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