You might try the 55gr Sierra Blizking, it worked ok in my 6XC which is also a 1-8 twist. I've never taken it to 4000 fps but I'm sure it would do it just fine. CheersCoyote hunting with a thermal. Max range would be 300yrds. Don't want to worry about hold overs. Have a 6mm creedmoor like to push a 55ish grain bullet near 4,000fps. Barrel has a 1-8" twist rate.
Which bullets have you guys successfully used that won't have the jacket come apart mid flight..
Thanks guys