I made it out to the range today. I tested 100 loads. I also blew out some cases for neck sizing. Loads all were with IMR 8208 XBR. My rifle seems to like it so I will stick with it for awhile. Of course, the tests go on. LC Brass was used in all loads except the Winchester White Box 55 gr FMJ loads. Primers were Win SR. Xtreme FMJ bullets were used for 50 rounds and Hornady 55 gr psp bullets were loaded for the other 50 test rounds. ALL were plenty accurate for a yote gun. But my rifle seems to like 24.0 - 24.9 grains of powder and the Hornady 55 gr psp's the best. I don't have targets for the XTreme bullet loads. They were not quite as tight as the Hornady's so I did not keep them. All groups are 50 yards. Target 4 is a 10 shot group. All others are 5 shot groups. All groups shot with Mossberg MVP Varmint 5.56/.223. Center Point 4-16x40 scope. Load data is as follows: LC Brass; Win SR Primers; IMR 8208 XBR; Large GO-rilla bag; 55 gr Hornady PSP. Target 1: 23.0 gr Target 2: 24.0 gr Target 3: 24.0 gr Target 4: 24.5 gr Target 5: 24.9 gr I think I can do better: Farthest measurements are as follows: T-1: .778" T-2: .327" T-3: .490" T-4: .630" (10 Shot Group) T-5: .544 T6 and T7 are here also but I have to go dig them out. 55 gr. Hornady PSP IMR 8208 XBR Target 6: 23.0 gr Target 7: 24.9 gr Farthest from center: T-6: .602" T-7: .700"