I had a K98 barrel that had a 8mm Gibbs chamber
I used the surplus powder from the 8x63, salvaged along with the bullets and the cases were fireformed from 30-06 cases.
The best velocities I could get out of that combo was around 2650fps. Accuracy was OK.
Then I went to IMR4350. I used 62.0grns over CCI250 primers and used Sierra GK 200 gr bullets. Velocities were just over 2750fps out of that barrel and accuracy was very good.
Felt recoil was brutal.
This load wasn't quite as hot as the load suggested steve's pages but an extra couple of grains of 4350 will hardly be noticeable in this case.
I used the surplus powder from the 8x63, salvaged along with the bullets and the cases were fireformed from 30-06 cases.
The best velocities I could get out of that combo was around 2650fps. Accuracy was OK.
Then I went to IMR4350. I used 62.0grns over CCI250 primers and used Sierra GK 200 gr bullets. Velocities were just over 2750fps out of that barrel and accuracy was very good.
Felt recoil was brutal.
This load wasn't quite as hot as the load suggested steve's pages but an extra couple of grains of 4350 will hardly be noticeable in this case.