on that note I've heard of Hodgdon miss labeling powder too. If I remember correctly about 10 years ago there was a lot of I think it was hodgdon Universal shotgun pistol powder was mislabeled and it was recalled the bottles actually had rifle propellant in them that hodgdon doesnt even market labeled as Universal. Also hodgdon just a put another powder recall out on a specific lot number of LIL'GUN powder. I wouldnt doubt that it is a case of mislabeling aswell.

Your gun blowing up may have had nothing to do with winchester or BPI, your trip 7 may not have actually been trip 7.