To be honest, I have had great luck with federal brass in 308win and 270win. I have about 200 pieces for each caliber. Seems softer. But both caliber have been shot about 3 times. Necks are getting a tad harder.

So I figured I would give it a try for 300RUM. The remington brass for my 300RUM has trouble getting into my press. Tryed two different shell holders. The bottom is not perfectly round. Remington said the problem has been corrected.