300WM, Berger 210, and H1000: Starting load and OCW test recommendations

[dmossu]

Just checking to see if anyone had any recommendations on starting loads for a 300WM, Berger 210's, H1000, and Norma Brass.

I plan on running a pressure test, then test seating depth, and then running an OCW test - but am not sure at what powder charge I should start at and a rough idea of when everyone is seeing pressure

 

[WeiserBucks]

Start at 73 grains.

 

[dmossu]

Start at 73 grains.

Then build up to like 76 in .5gr increments?

 

[InkedElkSlayer]

I shoot 215s, but I shoot H1000, Norma brass, Fed215s, so it’d be very similar. 74.0gr H1000 and OAL of 3.630

Wife’s 300WM shoots 215s also. Hornady brass, cci Mag 250s and 75.5gr H1000 with OAL of 3.605.

I would agree with the posts above for the 210s. Start at 73, working up to 76. Try .015 off the lands and seat deeper if needed for your magazine.

 

[Leo45]

Not same bullet but similar….
I use 77 grs with the 208 eldm, Norma Brass and H1000.
Norma brass has quite a bit more case capacity than other brands of 300wm brass.
Just for example my load with Hornady brass was only 75grs

 

[Rick]

Obviously start low and work up. I ended up at 77.3 grains H1000 @2995, 210 VLD, .010 off, CCI, Normal brass in a 26" Broughton barrel. I tested up to 78.0 without pressure concerns.
Brass is closing out third firing and starting fourth.