My USPSA minor load is 145 gr LRN on top of HS-6. Stupid accurate, but dirty compared to N320. Generally, in minor PF, the heavier bullet slaps steel with more authority. Faster powders than my choice will give you a different recoil impulse. This has been working so well, I have been using a lighter spring weight in my M&P Core 9 5", shooting in Carry Optics. The USPSA Frontsight magazine list all the components used by competitors. TiteGroup and coated bullets top the list as does 147 gr bullets, N320 comes in 2nd for production guns. Titegroup is cheaper than most, accurate and small charge weights for bonus savings. The Single Stack Nationals also indicated this powder trend.