Has anyone necked down a 338rum to 7mm.I was thinking of doing it. I made up a dummy round. the case will hold 94gs, of retumbo with 160ab no worries. I think speed will be close to 7rum as 2 rifles i have seen 94gs is close to max. Powers here in oz are hard to come by. we can get retumbo, h1000,RL25. 7mm rum would be easy way to go but i would like to do some think different. the bullet sits out of the case a bit more so what do you think.