Has anyone given Rl-33 a run pushing the heavier for 7 rem mag bullets? If so, please share pertinent info and results. I'm curious about velocity gains over Retumbo, but more importantly accuracy.
I have been testing RL23 with a Criterion 26" Remage and 180gr ELD-M bullets. Today I went out and shot five three shot groups at 100 yards. It was a balmy 36 degrees with wind blowing directly towards the target. I did a small batch of chrono results up to 61 grains showing accuracy potential. 61 grains gave me 2860 fps. Today I did 61-62.2 in .3 grain increments. I'm going to play with seating depth at 61.6-61.9 grain area, currently 0.030" off. Will do a larger batch hopefully tomorrow and go back to the magnetospeed to get velocities and confirm at 300.
I know it's not 33, and I may be leaving some velocity out there but it's showing great accuracy potential and I've always used RL22 in my 7mm mags.
SHM
In your photo I notice all most of your groups show minimal vertical spread, but excess horizontal. Do you equate this to the 6-10 mph wind? I only ask because I was just shooting in similar conditions and had one group that was 1/2" horizontally x 1/10" tall. All other groups close to this charge were between 8/10" to 1" groups, but all were typical triangles.