Mil-surplus powder for 300 rum?

[ajhardle]

Is anyone using 867 or 872 for 300 ultra? Or anything similar? I might give it a try in 7mm rem mag also.

 

[billn17]

I use wc872 for my 300 wm and love using it. I'm loading 84grs to push 190 smks and 83 for 215 hybrids. I shoot a remmy 700 with 27 1/4" shilen. I get same hole groups at 100 and opens up to 5" at 700 yrs.

 

[Lefty7mmstw]

Yep, the 300 rum will do well with wc872. 104 gr on a 190 or 112 gr with a 180 will shoot sub moa in my rifle. I prefer rl25 or rl33 but this stuff is cheap, goes bang, and does a fair job at pushing a pill downrange.
I've burned wc872 in my 7rem with 175's and it wasn't as impressive. Come to think of it, the 7 rem isn't that impressive. I should have it reamed out to 7stw but I have too much brass for it yet. I'll barrel it and toss the brass when she dies.

 

[AKGuide]

The surplus powders are great in the 300 RUM. They seem to prefer the heavier bullets. Just make sure to keep them in an inside pocket when the temp drops a bunch as the velocities will drop quickly. LTLR does a bunch of work with these powders in his 300's.

Reuben

 

[ajhardle]

You guys have got me excited for my shipment to show up. I was shooting 200 Berger's,I just ran out, and I have a box of 230 hybrids, but maybe some heavy Sierras might fit my budget better. What bullets are you guys using?

 

[AKGuide]

220 smks with retumbo but have moved to 240 grainers using h50bmg. My first ever attempt at 1000 yards I used the 220s and they produced a 6.4" group. Sierras shoot really well. Any match king should work well for you. You need to push the 240s at 2900 minimum in a 10 twist to properly stabilize.

Reuben

 

[ajhardle]

I have a 32" 1 in 10. 2900 fps is somewhat mild.

 

[AKGuide]

I have a 28" and it is mild also but with an ES and sd in the low singles I left it be. Also the brass lasts forever, primer pockets stay nice and tight, and it shoots bug holes.

 

[ajhardle]

I finally got some magnum primers (Remington 9 1/2m) and did some shooting. I went from 97 gr. to 102 gr. of wc872. Velocities from my 32" barrel ranged from 2949 to 3140 with the 230 Berger hybrid.

 

[digger11]

Where are you buying the surplus from.I haven't bought any in a long time.

 

[ajhardle]

Wideners reloading. The only stuff available was for .50bmg and 20mm, and those should work for overpowered magnums, like r.u.m.