I've been doing some load testing with AR Comp and 175grn Berger OTM's. I have two loads right now that work really well. The one is 41.3 gr at 2.300" (measure to ogive, .066" off the lands) that shot a 3 shot group of .282" at 100yd. The second best is 41.8" at 2.356" (.010" off the lands). I am going to run this load again as I was getting and ES of 5 with an SD of 3. The other I'm not sure. Preliminary with the 41.8g show 2720-2725 fps. This is about .4gr over max. Alliant doesn't have load data for any of the Berger's, so I used the SMK load data.
Here's how it panned out. I didn't chrony all of the loads due to a brain fart on my part!
All 3 shot groups accept for one.
Pwd wt, C.O.L, group size
41.3- 2.351" .678"
41.3- 2.300" .282"
41.8- 2.346" .609" 4 shots. This might be another to look at. The fouling shot dropped about 2-3" from center, next 4 shots were in the center.
41.8- 2.356" .362"
41.8- 2.300" .734"
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