my experience with 45acp with my guns and several good shooting buddies totally supports what Dougguy has posted . In our group we have 2 Walthers 2 HKs a CZ97 2 sig p220s springfield 1 xds 1 xde and 2 Glocks a large assortment of 1911s I may have missed some , we all shoot commercial cast Hi-Tek 200 grain rnfp .452 bullets we all use the LFCD and we get little to no leading but we all had to work up loads with a shorter OAL than is ideal , because of the way the chambers are cut.
I am the only one that casts in this group . I don't have a barrel done by Dougguy because I load for so many I would have to get them all done to work with the same load or none to keep from having to match ammo to gun I don't want the complication , so at some point I may send Dougguy 4 or 5 barrels at once to have done , what we do works for what we shoot but is not what I consider ideal.