Thread: 284 win brass question

Hi folks

So I've been working up loads for my 284, its a tikka action with a 28" TF Varmint Barrel.

I've been using Norma brass, 168gr Berger VLDs and 2209. I've run through loads from 52-53.5gr.

I get good half inch groups at 53 grains but get excellent sub half inch groups at 53.5 grains ,

The issue is I have ejector marks and sticky bolt at 53.5.

Is necked up lapua brass likely to hold up a bit better? I have heard that norma brass is on the soft side.