I've been thinking about this. As they say that won't get me to far.
Last night I was thing twist rate was to fast. Your are using Long Range bullets. I don't have any experience those types bullets. I believe that you have the twist rate to go to all copper bullets like Hammer bullets. I have been impressed on how they are built. Agin I having used them yet, but this summer I think I'll get the chance to use them with a rifle that has the twist rate needed to do the job this summer. I have a 2nd being built, but won't see it until next year. So I'll keep watching and reading. My come across something that may help.
Some rifle just don't like some bullets, and I have come across that over the year.
This is a great place to read and learn. So good some bad.