I've been purchasing loaded nosler ammo to use for fire forming in my 260AI. The first couple of boxes were 0.015, but my most recent boxes were 0.013.
I started out using a .293 bushing with the 0.015 brass and couldn't figure out why the newer brass wasn't giving me the correct neck tension. I went back and remeasured the new 0.013 brass and realized I needed a .289 bushing which I now have on order.
Hope that helps!
Edited by stxhunter (01/11/16 06:37 PM)
Specializing in Hog Hunting and Night Vision Equipment