Originally Posted by deserthntr
its a 1-10 twist, ill give the 115's and the h-4350 a try. a freind gave me some loads that shot real well for his roberts that are barnes ttsx with imr4350. ill give both a try. got 2 days off work to go camp this next weekend. we'll see how it shoots. i know this isnt a big gun but id like to practice out to 800, this guy i got these loads from shoot his to 800 for practice, so i kinda set a goal to match that.
1:10 twist may be marginal for a 115gr 25cal bullet depending on several factors. Sometimes you can overcome that with velocity. But, 257 Roberts isn't a 257Wby either.
If your rifle doesn't quite like them after a good load workup, try something a little lighter/shorter, but with the best BC you can find.
Flat base bullets may give better accuracy from 100-300 yds. But, the BC of the boattails and VLDs will make a difference at 800 yds.
Let us know what you come up with.