H1000 Or Retumbo

SHRTSHTR · #1 09-03-2009, 04:38 PM

Hi,

I would like to know what 338 Lapua owners prefer, H1000 or Retumbo for 300smk's? Everthing that I could find seems to favor H1000. Also, which powder is more temperature sensitive?

From what I have found on LRH and other sites, Retumbo seems to give better velocities than H1000. Look forward to hearing your suggestions.

Ray

SES50 · #2 09-03-2009, 04:52 PM

I am running 92gr H1000. I am getting about 1" Groups at 300 yards. Velocity is around 2750 out of a 26" tube as I recall.

SHRTSHTR · #3 09-03-2009, 08:24 PM

SES50,

That says it all about H1000 in your gun. I can only hope mine does that well when I get it.

My barrel is a Lilja 1-10 twist, *8 contour w/28 1/2 barrel + Muzzle Brake. I'm pretty sure H1000 is the way to go, but would like to hear about folks using the Retumbo. If all else fails...I will try both powders when I get the rifle.

guns_and_labs · #4 09-04-2009, 08:48 AM

I'm just starting out on this, but I'm finding Retumbo better than H1000 in several of my barrels. In fact, if you want more H1000, I'll trade you. Just PM.

SHRTSHTR · #5 09-04-2009, 09:34 PM

Would you mind sharing a little more info about your loads with Retumbo? Velocity, ES, SD, etc. I would also like to find out how temp sensitive Retumbo is if you know.

I already have a 8lb. keg but Thanks anyway

B23 · #6 09-05-2009, 01:38 AM

What about RL25 and US869? Are many of you using either of these powders in your 338LM with the 300smk's?

mtang45 · #7 09-05-2009, 02:11 PM

Not 338, but I have tried both in my 7mm STW. I can get higher velocities with the Retumbo than the H1000. If I continue to load up the H1000 attempting to get close to launching a 168 gr Sierra MK at 3200 fps as I get with the Retumbo, I start getting severely flattened primers and I get nervous about pushing any harder. The best velocity I can get with the H1000 is about 3080 fps.

I assume the same relationship between the powders would exist in the 338.