My Encore Endeavor will shoot FPB in a minute of angle only tried the Thor once to much trouble getting a good fit to expensive. The FPB work really good all I did to them was take out the breach plug and push them through the barrel to get the fit right so you can load quickly for hunting load and shoot. I use 90 grains of Blackhorn it shot so good I did not try anything else or any load I only use them where sabots are illegal. I try one batch of Thor after finding the size for my barrel [e-mail for a sample pack for sizes] and tried them with the same load they shot 2 inches at 100 yds not near as good as the FPB but hunting accuracy, might do better if I worked with them some.