As an appendium to this old thread.

London Proof house have revised their methodology under the new Master.

All rifles are being proved with loads assembled in Birmingham. If no proof load exists then one has to wait until they obtain one.

I had to do this last month with 2 new .318WR

I am somewhat uneasy with the science. I am informed that a 10% powder overcharge on book maximum is being loaded. The technicians were unable to give me any further data. I did point out that increases in powder did not necessaraly give liniar increases in pressure. But these guys do not make the rules.

I was not present when the WR were fired my employee was. He tells me that the report was so loud when one of the rifles was fired that the technician was startled. The bolt on that rifle had to be hammered open.

I am not sure the new regeim is a step forward.

Regards