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US869 and 300 Win Mag

Is that for the 50? Maybe fill the case to bottom of the neck. :LOL: :LOL: :LOL:

Hodgdon lists 85g max with 200 Nosler partition, 83.5 with 230 Beger. Don't have 208 data, had my Hornady manual sitting here, but it doesn't have 869 data.
 
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I'm out of the H1000 and looking for a good starting point with US869 and the 300 WM. Using the 208 ELD-M bullet and hoping for the 2950 f/s range. What would be a good starting point powder weight?

BELOW IS A RANDOM THOUGHT BASED ON COMPLETE PONTIFICATION *USE AT YOUR OWN RISK*

Well, 869 is a few steps slower than WC857, so I'd venture to say you're probably gonna start at like 70-72 and won't be able to get enough powder in that case to get the velocities you want.
 
Out of curiosity, I ran it in quickload. It read 50KSI with a 108% charge with a long-seated Sierra 240 HPBT match. Velocity was nothing spectacular either.

I've used WC860 military BMG powder in .338 Edge. I've run a FULL case of WC860 behind Sierra and Berger 300gr projectiles (~105gr of powder) and was just getting up to max pressure and achieved 2700fps. Both velocity and accuracy were better with 10% less Retumbo. I'd be surprised if you'd be happy with US869 in .300 Win Mag.
 
Screenshot_20200517-025609_Chrome.jpg


This is for a 220gr. But maybe it can help with your load.
 
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Back from range withe the 300WM. Tried US869 cause H1000 has vanished from the free world. Use Federal military brass, 208 ELD-M and 250M primers. Couple of loads were under .5 MOA but velocity had a large spread. Crono was a Labrader. Even at the largest loads, no pressure signs. Will save US869 for the 338 Lapua Mag

PowderWeightBulletPrimerAverageSD:ES:
US86983.0208 ELD-MFed 250M2562.71019
US86983.3208 ELD-MFed 250M2576.71322
US86983.6208 ELD-MFed 250M2572.01224
US86983.9208 ELD-MFed 250M2609.31426
US86984.2208 ELD-MFed 250M2594.71323
US86984.5208 ELD-MFed 250M2615.71324
US86984.8208 ELD-MFed 250M2628.71733
US86985.1208 ELD-MFed 250M2628.01834
US86985.4208 ELD-MFed 250M2657.31020
US86985.7208 ELD-MFed 250M2672.01832
US86986.0208 ELD-MFed 250M2703.34175
 
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