Another case that has merit IMO is the 300 Norma mag case if you want to run lower chamber pressure OR you want to push it!
Hey cowboy I like a nice surprise I will have marshal send me some in my next order. What are you shooting them out of
I also thought about the 300 Norma, but I think it's too much for the 270 to get decent barrel life. If I was to build a 7mm, with the same type of chriteria as stated before, I think the 284/300 Norma Improved would be perfect for a 190-195 gr bullet.
I don't know, it's less capacity of the 270 Allen Mag and there are 800+ round rifles out there that have lived life at full throttle +. Take the Norma mag with the shorter powder column and idle it back the barrel life may do well.