Re: Filing or cutting bullet tips.
Most States forbid nonexpanding bullets for big game hunting, however I would point out that "solids" have been used for heavy and dangerous game successfully for decades. I use fmj's for 'yotes so as not to damage too much fur.
In fact, Peter Capstick once wrote that he felt that solids were just as effective all around as any other type, citing bullet placement as key in any game hunting.
Bear in mind that hunting laws are not necessarily written by those who really know anything about guns.
You are what you do, when it counts.