powder for .338 Lapua

[wboggs]

Anyone used MRP or MRP2 with 300 gr bullets?
Interested in user's opinion as to the optimal powder with 300 grs. in a 28-30" barrel.
Thanks
Bill

 

[Jeff Von Rosenberg]

I have good luck with 250 Lapua Scenars and H1000 JVON

 

[wboggs]

Would like to use the 300gr. Thanks for the 250 data.

 

[dkhunt14]

H 1000 is a good powder for the Lapua case. Reloader 33 worked a lot better and less pressure. Got easily 100 fps more. Matt

 

[its only light]

H1000 and retumbo work good. I was using rl25 with good accuracy. Switched to rl33 now and gained 100fps with the same accuracy

 

[Drop Port]

I have always run H-1000, Retumbo or R-25. For those of you running R-33 where does it fit in? How many grains area you maxing out at?

 

[wboggs]

Any source for R33? Is it temperature sensitive? I have never seen any data on it and am also interested in info.
Thanks
Bill

 

[its only light]

http://www.alliantpowder.com/reloaders/recipedetail.aspx?gtypeid=2&weight=300&shellid=180&bulletid=295

This data is a 24" barrel

Precision reloading in mitchell sd had it in stock a while back it hasn't changed speed through my chrono from 40 degrees to 90 so think its good.

 

[its only light]

http://www.midwayusa.com/product/2184856222/alliant-reloder-33-smokeless-gun-powder

Midway has 8 pounders in stock

 

[wboggs]

Thanks to all, this site has the most helpful and informed members I've ever seen.
Thanks

 

[338 Mollett]

Is that a stick powder?The charge they list shows it burns much slower than retumbo.

 

[dkhunt14]

Yes it is a stick powder, Looks like 4831 on steroids. Yes it is slower than Retumbo. Fits in between there and Reloader 50. Doesn't meter very well, but seems to be a good powder with good temperature Stability. It is made is Sweden where the other RE17 and RE 50 are made. Not in Australia like the rest. Burns with a less progressive pressure curve like RE17 and RE 50. That's how you get the velocity. Seems to be a good powder in overbore cases and big cases.