All this talk has me wanting to call manson reamers and spec out a new chamber. Blow the shoulder out on a .338 lapua another few degrees over an ackley improved. Should be able to get another grain or two of a compressed charge of super slow burning powder. Could probably get a other 50 fps out of it and max out barrel life around 500 rounds. I shall call it the 338 Uberhypermacht Ultra Magnum and I will take it to all the local ranges shoot a couple rounds off the bench then stand around and tell everyone about it. The long and short of all the .338 wildcats these days is that they are all have extremely similar ballistics. None of them stand out enough from the other to warrant specialized chambers and mandatory brass fireforming. I see the same phenomena around here with guys and their trucks. Stick a lift kit in it, some fancy rims and big tires then roll around town all day bragging how awesome it is. I never seem to see them out in the bush and mud though.