Semisane

I think I might be able to answer some of this but you are probably not going to agree a whole bunch...

I would almost bet you some of what you are seeing is because of the "crush rib" sabot...

The 250 grain bullet does not have the length of the 300 grain bullet, when you put it into a sabot and put it down the barrel there is somewhat less bearing surface pushing the sabot against the bore... when you put the 300 grain bullet down you have a greater bearing surface against the barrel. The 300 is going to seal the pressure better than the 250's. This also might explain why you are getting better groups with 300 grain than the 250's.

Have you ever tried using regular Harvester sabots in your bore? It might perform even better - if you can get it down - I can not remember what you are shooting.

Your velocities are somewhat lower than mine using the same charge, but that could be in the chronograph itself.

The only reason I think I can say all of this and think I know what I am talking about is several months ago I did some sabot testing for MMP. I tested HPH-24's Regular Harvesters, MMP's new 3 petal sabot and the "crush rib" - I should also say that MMP did not direct the testing of MMP vs Harvester. I did that on my own for my own information...

In my testing the "crush rib" consistently shot lower velocities than did the 3 petal sabot - usially about 400 fps less than the 3p. On the other hand the regular Harvester shot with about equal velocities with the HPH-24.

I really thought I had those test results on this computer but they must be on the base computer... If you would like to see those numbers let me know - I think, I hope,I can dig them up from my other computer

I will post one ofthe targets with velocities that was shot during this testing with my A&H. I do not know why this target is on here and the rest are not.

Please do not think I am trying to trash the "crush rib" because I am not - all I am trying to do is explain what I found. The "crush rib" & the 3p should both be considered a sabot of last resort IF either the HPH-24 or the regular Harvester will not load into your gun. Also remember Harvester has both a short petal and a longer petal sabot - both consider regular Harvester sabots.

Hope I did not cause any hard feeling for anybody - Semisane I will use your last statement with your permission...- I just report 'em. (my numbers and findings)