I'm having a problem with a load I've been using. I have 180gr Berry's bullets with 8.2 grains of Power Pistol. The problem is the grouping of the bullets in my load is horrible. With factory ammo I can keep a 2" group at 7 yards fairly easily out of a G29. With my receipe I consistently get 6+" groups. Any thoughts on changes I can make that would help the accuracy of the bullets?