I measured my case headspace on multiple fired cases and found it was too tight. I use a redding body now that bumps the shoulders .002. Works perfect for me.
I use a Hornady headspace measuring tool from midway. You can make your own with .375 inside diameter pipe and a caliper.
Thx alot ! I thought shouldve been able to load more than 48 grains......thats close to what i can shoot in my .260 rem. With a 120 grainer although i switched powder in it .....went with h414 and it came together.....makes me wonder if h414 be any good in 6.5 284