Thanks so I should be okay to start at say 74 ?For what its worth, I worked up a load for a friends 300wm. Browning x bolt, remington brass, 210 berger vdl, 77 gr h1000 aprox 2900 fps (have not validated it yet). Proved very acurate. His brass was all once or twice fired.
I will be using once fired brass that he has sent with his rifle. The stamp says R.P 300 Win Mag.
Fed 215 Primer and H-1000. I would start with them seated .-030" off the lans. A good starting point for RP brass would be 73 gr. Work up slow and if you get to 77 gr you will be at max and see close to the reported 2900 fps. But please be advised most factory 700's I have worked with were showing pressure before 77 gr. This will also depend on your particular lot of powder. This same load in RWS brass I have found to be at max pressure at 73 gr. in more than one rifle. I believe this is due the the thickness of the RWS case and the loss of case volume. But velocities were still good with the RWS load.
Hope this helps
I am going to load some 210 match kings for a friend of mine . He shoots a 300 win mag . I plan on using H-1000 powder . What would be the starting point for the powder charge ?
Thanks for your time.