DoubleD
(.400 member)
28/11/20 04:08 AM
Re: The Rare Pleasure Of Obscure Cartridges

A nice promotional article for Roberson. I have seen several.

I have also talked with Roberson recently about making brass.

Still I haven't seen anyone yet reporting actual use. Load development and reloading experience with Roberson brass.

Turned brass has some issues due to its different molecular structure. Turned brass is hard and brittle. Annealing doesn't help. Turned brass has a propensity for longitudinal body splits.

Turned brass has normally only had a cylindrical interior. Turned brass in a bottle neck cartridge was straight interior. A .308 Norma mag with a straight interior is not a .308 Norma Mag.

I have 5 GS Custom Martini Cases here. They have a straight cylinder interior.

The 577/450 Martini brass I had from North Devon had a bottle neck. But the brass from them broke the 7/8-14 sizing dies, and when sized with Lee dies tore the rims off.


When I talked to Roberson they said these issues have been addressed.

Roberson has a 50 case minimum. I understand the reasoning for that. but at $430 with tax and shipping I don't see a line forming for this brass.

I may dig out my .411 Barnes and send them a chamber cast and some fired brass. I make that brass from .375 H&H brass.



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