I am a .284 Nut. I recently bought a box of Nosler custom brass in 6.5x284. I have a lot of Winchester brass but I have to weigh every case it varies from 193gr. to 213gr. I sort them and adj. loads accordingly. I have two rifles custom made . One has a long barrel 27 1/4'' and the other has a 25''. The Nosler brass average 197gr.
I use the 168 Berger VLD in the long barrel and a Nosler 140 Bal. Tip. in the short barrel. The reamer I had used is a .284 Win. GAP Match chamber. I seat the 168 out to 3.120'' and use Reloder 17 in both rifles.