I'm getting excited about my next AR build, a 6.5 Grendel. While I think it is hard to beat Hornady's 123gr. AMAX load; I may reload anyway later on. I have a small supply of Lapua 220 brass I had to make 6PPC brass. I can tell the 220 brass is shorter in the body and wondered if someone knowledgeable in this would tell me if I can fire form the 220 brass in the 6.5 Grendel chamber or is it too short to do? Only way to get 6.5 Grendel brass is to buy it made?