I'm not sure if it would matter either. I just know that on the LK-93 the set up is different between .50 & .54 cal. Years ago I had my Remington 700 ML rebored from .50 to .54 with a 1-26" twist. Remington used the same breech plug in .45, .50, & .54 so there was no problem in knowing if it would work or not. Obviously you will loose some breech plug shoulder sealing edge going up in caliber. In my White rifles the breech plug walls that bottom on the plug shoulder are only .046" thick and I doubt the Knight plug would end up that thin after a rebore.