It’s a pain in the ass, if reloading isn’t an option and feeding other quality ammo in a quality barrel isn’t getting you the results you need, you can tamper with barrel harmonics by doing a couple things.
1. Do NOT excessively torque your muzzle device. This makes the barrel stretch when the barrel is heated after a few rounds and will scatter groups.
2.You can tune your muzzle device. Shoot a group and rotate it shoot another group. Record best group and use a high temp loctite and some clocking washers to set it in place.
3 this is the most tedious tip but can and will change harmonics. Originally torque your barrel but to 40 ft pounds, shoot a 5 shot group and let the barre cool. Tighten the barrel but 5 foot pounds and group again and cool. You’re groups will shrink and eventually get larger. Return barrel but torque to the best grouping.
Good luck!
Good advice. Thanks for adding to the thread. Welcome to the fire too..
