My sole 7mm rifle is an authentic, Wilhelm Brenneke on a 98 with a 28 in. barrel and chambered for the 7 X 64 Brenneke. My latest double rifle, a Vierordt, was apparently re-chambered from the 8 X 62R Vierordt to the 8 X 65R Brenneke in Prague in 1941. Then when it came to the US as a war trophy some ham handed individual screwed with the chambers and I had to use 30R Blaser cases as the donor. It shoots quite well now....finally.