I worked long and hard shooting a few hundred shots finding the combo that would work for me and 150gr loads. I bet I have one of about every sabot out there trying. Trying 777, 3F, 2F, pyro, 3f 2f, trying pellets. Tryed different breechplugs, different primers. What I found was 250gr barnes expanders and 130gr 777 2f with a special powerstem breech plug to do it. I am pushing 2000fps with250gr bullet. Itwas fun finding this load.