I prefer shooting flat point bullets for USPSA. I'm happy with the 147's I've used. I can usually load to 1.12 to 1.13 for OAL. These run fine. But the bullets are a penny a round more expensive than 124/5s. I've tried a few 124/5s, Acme, Precision, and SNS, for my Shadows. Loading as long as I can, with the 124/5 flat point ammo, I have occasional feeding problems.
My Acme bullets 122 FP, loaded to 1.04, run all day in my P-07 and a couple S&W striker guns I shoot regularly. In my Shadow, maybe one fail to feed in a 200 round match.
Does anyone have a 124/5 (or even down to 120) bullet that can load out to greater than 1.10 in a Shadow. I'd rather not ream barrels.