I'm looking for a reputable gunsmith in Louisiana or SE Texas to accurize an old Remington 600 in 243 win. I've had this gun for more than 40 years since my dad bought it when I was a kid. It has never been a precise rifle. 2 to 3 inch groups and seems to be picky with ammo. I've killed deer with it and my son has too, but I've never had true confidence in it especially past 100 yards. Does anyone have any recommendations that won't cost me thousands of dollars?