I've been extremely happy with adg/gunwerks brass. I use it in my 338 rum. 300 bergers @ 2830fps 1/4" moa and zero psi signs 92.2 N570. Bertram is garbage in my opinion and will never buy it again. I've had to return 6.5 saum, 300 norma and 300wsm. My friends 28N brass was so bad you could clearly see how inconsistent neck thickness was with naked eye.