I had 2 sets of the same barrel configuration. 1 barrel I had the lower barrel ported, you're not going to notice anything until you move up into pigeon loads. Between 4 shooters we coldn't notice anyting with clay loads that included Handicap loads also. Once we got into the 3.5drm loads there was less muzzle jump, with the 3 3/4drm loads yep. But I gave them up years ago, at the end of the day it's a waste.