These are rounds 75 to 100 and my first with the 131s. I'd been using Sierra 120 Gamekings to get some rounds through the barrel and form the brass. I'm using Starline small primer 6.5 Creedmoor brass, Federal Gold Medal Match small rifle primers, and Reloder 16. All rounds fired round Robin from left to right, beginning with lower left and ending with the upper left, which was an additional 41.3 round.
As you can see, no pressure signs whatsoever, even up to a high of 3001 fps at 42.5 grains.
41.3 - 2899, 2927, 2932, 2925, 2908, 2929
41.6 - 2915, 2941, 2932, 2911, 2920
41.9 - 2941, 2955, 2954, 2954, 2957
42.2 - 2970, 2975, 2969, 2978, 2982
42.5 - 2973, 2988, 2986, 2993, 3001
I was at a match and I was just shooting them at various range steel targets, so I don't have groups (groups with the 120 Gamekings were very impressive).