300 Win Mag and MP .311-235 AAC

[Roll Your Own]

I’ve read much on here and many other forums that gave very little hope in shooting cast in 300 Win Mag.with any success So, being one who colors outside the lines,
I went out on a limb awhile back. Using a Remington 700 Sendero with 1:10 twist.
Worked up a load based off an old Speer manual reduced load for 200 gr. jacketed Bullet.
I chose the MP .311-235 AAC NLG. For my bullet. Using WW alloy, powder coated and gas checked weighing 222 grains.
Starting load was 31 grs IMR 4198 Max 35 grs.
I chased it to Max of 35 grs increasing by 1 grain increments with no pressure signs
Group size kept shrinking with each increase . I stopped at the 35 grs with a 5 shot group inside a nickel at 50 yards. Opening up to 1.29” at 100 yards.
Average Muzzle velocity is 2047 fps.
There was very little spread in the w
Bullet weight and I didn’t cull by weight only visual flaws so I thought the group size was very good.
I had enough confidence in the results that I neck shot a doe opening day.
I’m satisfied that this load combination is definitely a keeper

[Camba]

Nice shooting!
That is a good load.


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[Winger Ed.]

That is good.
Your combination would be sort of rare.
Most people around here don't shoot cast in .300Mag, or .30 boolits that heavy either.