Recently had my custom .221 FB rebarreled with a 23.5" Broughton 5c in 223 Rem w/12" twist. Started working up loads with Hodgdon Benchmark. I tried using a moderate load of 25.5gr under 52gr Bergers & 52gr A-Max bullets with a Federal 205M primer in Lapua cases. Extraction was normal but primers were flat. Loads were used from .006" - .030" off the rifling with the same results. Velocity was around 3,215 ft/sec according to my Oehler 35P. Accuracy hovered around 2" @ 200yds; pretty disappointing. I'm wondering if I actually have high pressure or are the primers just soft. Seems like the charge weight and velocity would not indicate high pressure but I'd rather not have flat primers. What do you think?