280 AI Load Development

So I finally got to shoot a little today. Sent 3 that I had loaded,140 SPH over RL19. First time chronographing this rifle. Same result about 1"-1 1/4"or so and going under 2900 fps. Nothing outstanding. Tried my next 154 SST over 60 grs RL22. First 2 about 1/2" apart. I'm thinking well still haven't found it. Sent the third and the second hole just grew a little. Then continued to grow with each subsequent round fired, and they're going 3050 fps 1.5 go below listed max. Tried the 162 ELD-X next not quite as good as the SST but better than anything else I had tried.
 
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