Model 25's & pre 25's have been known for oversize throats in both LC & ACP versions . Cast bullets size to throats . Factory swaged lead w/ conical base used to be a cheap effective solution at std of original BP performance 255gr @ 900fps . Original gov't specs had to be able to kill a horse @ 100yds IIRC . Plenty for everyday walkaround use . The Keith bullet @ 1000 is about as much as I want , IMHO get a Ruger if you want more out the old gal .