300 win mag and superformance powder

[Nomosendero]

Deer yes & several. The old NBT that came in the Red box & said Solid base Ballistic Tip were real bombs, killed a bunch of Deer with it but nasty, no way I would have hunted Elk with a BT of that era. The 180 BT has been toughened up 3 times since then. i would not worry with the 180 BT on ANY Deer at 300WM velocities but would rather use a little tougher bullet if I shot an Elk up close, just to be sure like a 180 Accubond, further out the Berger but I am looking hard at the 215 Berger in 300 All-round due to having alot of SD, thus forgiving up close to a degree.

 

[rgn4life]

The OP was asking about Superformance and I found from doing a lot of Googling that there was very little information about this powder for 300 win mag. I have been doing a lot of experimenting with this combo and thought I would share my results for future searchers.

I have a savage 110 FCP 300 win mag and my loads were only for this rifle.

I started by figuring out the burn rate of superformance which was similar to winchester Supreme 780. I used the numbers for this powder from the Hodgdon Reloading Center.

Here was my load and results

PLEASE USE CAUTION WHENEVER RELOADING. THESE ARE MY RESULTS, YOU MAY SEE DIFFERENT RESULTS IN YOUR RIFLE. IN FACT THESE LOADS MIGHT EXPLODE YOUR RIFLE COMPLETELY.

300 Win Mag, 208gr Hornady Amax, PPU once fired neck sized brass with CCI #34 primer. (NOT MAG PRIMER) COL 3.420

Superformance:
67gr : STD = 14, Average 2734FPS, LOW=2720FPS, HIGH = 2753FPS

68gr : STD = 11, Average 2766FPS, LOW=2750FPS, HIGH = 2780FPS

69gr : STD = 15, Average 2813FPS, LOW=2790FPS, HIGH = 2834FPS

70gr : STD = 2, Average 2836FPS, LOW=2834FPS, HIGH = 2838FPS

71gr : STD = 7, Average 2917FPS, LOW=2910FPS, HIGH = 2929FPS

72gr : STD = 10, Average 2973FPS, LOW=2955FPS, HIGH = 2973FPS

73gr : STD = ND, Average ND, LOW=ND, HIGH = ND

I started to see signs of pressure at 72gr.

I have blogged this information in depth at:

Reloading for 300 Win Mag: Reloading 300 Win Mag with Hornady 208gr AMAX and SUPERFORMANCE Powder