RE: 250 vs 300gr
I have not had great luck with crushed rib sabots regarding tight groups. I went to these sabots due to the tight barrel omega issues that some people experience. While the crushed rib definitely makes loading easier I haven't been impressed with my groups at 50 yards with 250gr XTPs, 300gr XTPs, 300gr speer gold dots, or 250gr SST using this sabot (1-2 inch groups with a scope). In frustration I used some JB's on the barrel as recommended by some wiseman on this forum and tried some 245gr barnes spit fires which I could barely load when I got the gun. Since shooting a few pounds of powder and polishing the barrel the barnes bullets now load fine but definitely require more effort than the crushed rib combos. More importantly they make cloverleafs. I believe what others have said regarding tight load = tight groups and I intend on picking up some MMP sabots to try with the speer bullets.
I must admit that MMP has too many options for me to know which sabot or sabots to try first. Any suggestions for this situation? Also, where is the best place to get them? Direct from MMP or through a vendor?