Re: 6.5-284 Question
Wapiti13, you are essentially correct, but, becuase it was initially a wildcat and there was a parallel development period, there is a slight variation and two versions exist/existed.
The 6.5-284 "Norma" has slightly greater capacity than the 6.5-284 "Winchester". The first US manufacturer of 6.5-284 brass was Hornady, and there is a capacity difference of several grains between brass commercially produced by Hornady and that made by Norma & Lapua.
I have the Norma chamber and learned this dif the hard way, by wasting powder on starting loads meant for the Hornady version. My top loads exceed Win/Hornady brass by 4-5 grains, a HUGE and aggravating difference when one is working up loads at .3 increments. . .
The beatings will continue until morale improves.