Sluged bore @ .451" 45 acp 5.0Gr 700X Lyman 200gr BB tumble lubed with Xlox. .4515" to .452" as droped from the mold. Alloy scrap 75%WW rest pure lead, a guess. Oven heat treated @ 450 for 1 hr. then put into tap water. Thumb nail test shows bullets to be very hard. Leading is the same 40 thru 140 rounds. Accuracy did not change during test. Air cooled cast bullets sized in Lyman 450 are more accurate and lead a lot less. I knew these might lead, but wanted to see if accurace fell off. It did not.