Gun is an Aero Precision 10” barrel. I worked a load up from 15-17.5 of H110 with 155 Berger hybrids. 16.3 and 16.5 looked like this group. Everything else was 5” plus. I loaded 20 up at 15.4 and shot 3 shot groups letting the barrel cool between groups. Every time the second shot is getting thrown and the third comes back beside the first. What could be causing this? I tried less crimp and it was allot worse.