57.5 gr imr 4831 and cci 200 or fed 210 puts 165 gr sierra gk or nosler part into tiny groups(1/2" or sometimes better). Chrono read around 2925 fps outta a 24" tube. Tried a few other loads with mediocre results. This was my buddy's 30+ year old load and luckily my forbes seemed to love it.
