A little while back I stopped using imr 4227 in my scout conversion with the short His breech plug because there is a .542 section of unrifled larger dia. section in front of the breech plug and with my 45 gr. charge being such a short powder column I couldn't be sure that my bullet wasnt hanging down into that unrifled chamber. Another member had incurred some flame cutting damage with this scenario. Well the other day a very experienced sml shooter on another board clued me in on just how to check a certain load to see where exactly the bottom of the bullet lies in relation to that chamber. Yesterday I did what he said and found out that I am safe with my load as the base of my bullet is about 3/16" up into the rifling. I am very happy about this because that powder was getting me good accuracy results. It is a simple operation to check a load.