My grandpa's favorite rifle is his Ruger M77 in 243 with a 24 inch varmit barrel purchased in the 70's. It's always been a sub moa gun up until recently and he's realized that he needs to replace the barrel since the gun is shooting 6 inch groups. There's almost zero rifling left in the barrel. The gun would be mostly used for coyotes, whitetail and target shooting up to 500 yards. Reloading would probably be easier on him since ammo is so difficult to find right now.
He's thinking about either ordering a barrel in 6mm or 243 AI and having a gunsmith install it. Or would it be easier for the barrel to be reamed and re-rifled to a slightly larger caliber? If so, which one? Or keep it in .243 since he has another rifle with that caliber? I've read that a lot of gunsmiths prefer not to work on that specific gun and I'm hoping that he doesn't take it to someone who just does what's easiest and not what's best.
I realize a lot of the questions I asked are subjective, but I truly value what yall say.
He's thinking about either ordering a barrel in 6mm or 243 AI and having a gunsmith install it. Or would it be easier for the barrel to be reamed and re-rifled to a slightly larger caliber? If so, which one? Or keep it in .243 since he has another rifle with that caliber? I've read that a lot of gunsmiths prefer not to work on that specific gun and I'm hoping that he doesn't take it to someone who just does what's easiest and not what's best.
I realize a lot of the questions I asked are subjective, but I truly value what yall say.