Thats kinda strange considering the conditions you mentioned but i have no experience with Thors. I do however have experience with Knights w/NFPJ, a Win209 shooting PR conicals. They fit a bit loose and not one had a hangfire or FTF.

Actually my best 3 shot group ever was with this combo in a 45cal but it was a 360gr. Ive shot a few resized 45s sabotless with no issues other than accuracy which i THINK i can over come with the correct sizing dies.

The earlier Knight NFPJ wasnt the best with BH209 but my results with the Lehigh and Win209s have been 100%.