Shooting basically coyote but may shoot for long range deer. Want to extend barrel life so thinking a 243 cal heavier grain bullet. Read that with a 1:10 twist, the bullet weight does not matter. However want to narrow the choice of factory ammo to try for budget reasons and then buy in quantity for the winner. Therefore not only the bullet weight but quality and consistency of the factory ammo does too. What factory ammo do you suggest I try to find a very accurate load? Thanks in advance for any replies.