...My first impression was that the closed seal was better in my gun but then I thought that the seal height being lower may have accounted for the higher velocity but then if that was so why was the Apex seal so bad being the lowest of the three??...
It's possible but I don't think so.The apex seal was only 1/2 pound tighter and I don't believe 1/2 pound will account for 83 fps difference.I resized the Apex seal and got pretty much the same velocity numbers.