Most of my custom barrels stabilized between 60-100 rounds. My 8 twist brux 243 took a bit longer. Somewhere over 100 rounds the groups went to crap about 1 moa. I chronied it and found it had sped up like 80-100 fps. I reduced the load a bit and matched to earlier speed and groups were back under 1/2 moa. Shot several rock chucks way out with 105 amaxes with that rifle. It still shoots. Jim See built it for me about 17 years ago. It was my first brux.
Bb
