I believe I have found max for this combination in my rifle, considering the 5 times this brass has been loaded fairly hot.  
Notice the INSANE primer pucker on the middle case. That is why im using Mag primers. To take advantage of the 
extra thick cup material. (Yup, i know... I need to bush my firing pin)

Vit N-540, 182gr. PPU Bullets, Mag Primers

1. 52gr. 2714fps
2. 53gr. 2836
3. 54gr. 2838
4. 55gr. 2907
5. 56gr. 2916
6. 57gr. 2941 (primer came loose and fell out of spent case)


23.7" barrel