SJB358":16frqcuw said:
I'm working up a load for a Rem m700 26" with a 1-9 twist, 130gr ab's with fed 215 primers and R-P cases. I've weighed and checked neck thickness variance and even though all cases are from the same lot factory loads, I think changing to a better quality brass would help.
RL25 and 7828SC both gave me good results but Retumbo didn't work for me either. The speed was there without pressure signs but groups varied too much. I've just started using MagPro with 130 ab's and its showing a lot of promise. It looks like I'll be able to get single digit sd's at a little over 3300fps. The last group I had was well below moa at 3275 fps with no signs of excessive pressure but I haven't had time to shoot multiple groups to make sure it's going to be repeatable. So far I'm liking it better that anything else I've used.
BTW, I'm not sure if this just concidence but with the other powders I've tried (7828, retumbo, rl25 and rl22) I had to raise the starting pressure to about 8000#'s in quickload to match chronograph speeds. With MagPro, I left the starting pressure at 3250 and was very close to the actual chrono speeds.
