What is your reasoning? the reason i ask, is just because X factory ammo is the most accurate for this person doesnt mean that its good for you... and are you talking plinking ammo... hunting ammo..... or high end match ammo.... all of them have differant degrees of accuracy and vary per gun.... i would say any match ammo would be the best factory ammo regardless of caliber... but that would be generalized as i have not shot a 22/250 enough to be able to catagorize ammo and its accuracy.
I just purchased a Savage 11fc 22-250, it has a 1 in 12 twist. I have also seen a 1 in 9 listed. I won't be getting the rifle until the end of April. But I am also interested in opinions on bullet types, I will be using it to shoot ground hogs mostly, and at least one coyote. Damn critter has been eating the cats next door, we think, any how they seem to be missing at least one a week. The coyote is also smart enough to stay out of range of a 22 long rifle, and seems to know when you are laying in wait. Savage recommends a Federal round in 50 grain vital shock, I think.
i have a 1 in 12 twist which easily accomodates up to 55 grain. I am just looking for advice on what if any factory loads seem to be the best. Any info that can be provided would be greatly appreciated.
I think you will have to try them to find out what works best in your gun.
Knowing the twist rate does help, but there are other factors about a gun that can make it behave differently with different ammo. When you are talking about high precision, very small differences between different guns like the exact chamber dimensions, leade, etc., can make one kind of ammo work better than others.
Posting the exact type of rifle you're using may help some - you may be able to get feedback from other people who shoot the same model. Even with the same manufacturer and same model, though, different folks get different results from different guns.