Montana Bullet Works Lists
45 Colt, LBT, 315gr, SWC-K
45 Colt, LBT, 315gr, SWC-K-GC
45 Colt, RCBS 82083, 300gr, SWC-GC
https://www.montanabulletworks.com/shop/?filter_caliber=360I've used the RCBS 300gr SWC-GC from MBW -- it actually weighs closer to 315gr lubed and checked. It has been very accurate with "Ruger Only" loads in several different .45 Colts and a .454.
Paul