Re: Filing or cutting bullet tips.
If the fecal matter struck the rotary oscillating cooling device, I'd just hunt with ball, and not worry about it.
I have heard of people getting away with it. Remember reading about a guy with a 95 Winchester, during WW2, and ought six could not be found. A friend of his stole ammo from on base for him, and he cut the noses off with side-cutters and shot 'em. Nothing happened.
But, you got to think about how a bullet is made. They take a copper cup and fill it full of lead, and then they shape it. For soft point bullets, the open top of the copper cup is up, the lead is exposed in the open top of the cup. For FMJ bullets, the cup it turned upside down. The solid bottom of the cup is shaped to the point, and the open top of the cup is now the base of the bullet.
When you shoot a soft point bullet, hot powder gases are pushing on the copper bottom of it. No problem. When you shoot a FMJ bullet, the powder gasses are pushing on the exposed lead, but the other end of the bullet is closed, so again, no problem. But when you cut the point off a FMJ, you now have a copper cylinder, open at both ends, full of lead. If you shoot it, maybe the whole bullet will go merrily along its way like it is supposed to. Or maybe the lead core, with nothing at either end to hold it, goes shooting downrange, leaving the copper jacket in the barrel.
I wouldn't do it, and would not recommend it to anyone. It's like ringing a shotgun shell. You're just asking for trouble.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.