.338LM 300gr recipes please

[6MT]

As the title says, what are your favorite recipes for the 300gr bullet. Here's my kit:

26" heavy Kreiger 1:10
Lapua brass
300gr SMK's
Retumbo
CCI magnum primers

Because of the cost of doing these tests, I am looking for some insight from fellow shooters to get me started. I am leaning towards starting at 89.3gr because a little Googling shows this as a popular choice. But I am concerned with lower velocities. I know velocity is not the be-all end-all of precision loads. So, upon further research, I have found popular loads at 90.5gr, 91.5gr, and 92.0gr (all Retumbo).

My end goal is a decent load out to a mile and beyond. What say you?

Andy 6MT

Edit: I'll be doing a soft jam at .005" off the lands.

 

[uda123cat]

I just finished doing something similar with my 338 LM surgeon action/kreiger 9.5 barrel (26 inch) using the berger 300gr OTM with 92.0gr H1000 and Federal 215M primers with no pressure signs at 80 degrees F yielding a consistent 0.25 MOA. I debated between Retumbo and H1000 and went with the H1000 for no good reason (have both). I will stick with the above for now and see how this load does over time. I started with 88 gr and worked up to 92.5 gr and found two solid nodes. I know many have found Retumbo to be a great powder with consistent results and no doubt will work for you as well. This is what I found for H1000 should you ever wish to switch powders, something similar may work you too.

good luck and have fun

dan

 

[dkhunt14]

RE33 is a great powder for the 300 grain bullets in a Lapua. You will get at least 100 fps more and less pressure. It is also a very accurate powder. It has worked great in every gun we put it in. Matt

 

[Wildcats]

I've used H1000 and VHT 170 extensively in the 338 Lapua with great results,but the RE 33 is new
great powder i hear for the large magnum cases

 

[Jgraf]

I've used H1000 and VHT 170 extensively in the 338 Lapua with great results,but the RE 33 is new
great powder i hear for the large magnum cases

How temperature sensitive is RE 33?

 

[Jgraf]

RE33 is a great powder for the 300 grain bullets in a Lapua. You will get at least 100 fps more and less pressure. It is also a very accurate powder. It has worked great in every gun we put it in. Matt

Same question. How temperature sensitive is RE 33 compared to H1000 or Retumbo?

 

[dkhunt14]

I use it for hunting and haven't seen big swings in velocity. Matt

 

[Wildcats]

Same question. How temperature sensitive is RE 33 compared to H1000 or Retumbo?

I've always found H1000 to be somewhat temp sensitive as opposed to the VHT 170 powder.
i know a few guys that are have told me that RE33 seems to be more stable
Here the temp doesn't change much throughout the year 75 + or - with an average hum.at 68%
Been using Retumbo on my 7STW and it seems to be temp sensitive as well even with a temp change of 10-15 deg. higher.

 

[germanlongbow]

Retumbo 96.6 works fine. RL 33 102.6 as well

 

[centerlineseal]

I realize I would have to work up to that level, but you were able to go to 102.6 grains RL33 in a straight 338 LM without excessive pressure symptoms, correct? What barrel length and velocities were you able to achieve?

Thanks