Only other thing I can think of was maybe the bullet/sabot was not fully seated on the charge? I try and be careful about not jamming the bullet/sabot down too tightly so as to not destroy the bullet tip. Shot two shots at a deer the other day, first with T7 loose then follow up with two T7 pellets and absolutly no delay in ignition whatsoever. Second shot found the mark at 200+ yards. I was very pleased and wonder now if its more user error than anything.