Re: 338 edge brass ?
Did you mean 200 gr Nosler Btips?
There are just too many variables in barrel life. I've had guys shoot out barrels in 1000 rounds and I've got guys on almost 2000 rounds still shooting. I'd love to give you an answer but I just don't have a solid accurate answer. I'm hoping to get 1500-1800 rounds of premium accuracy from mine but that is just a hope.