338 Lapua reloading with 250 Berger and H1000, question on expected speed.

WEATHERBY460

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Started reloading a new Savage 338 Lapua with a 26" barrel. Speeds checked using Magnetospeed V3.

I get 2800 fps with 90.3 grains of H1000. Seated to mag length (3.750"). Does not seem over pressure, but most load books list 2800 fps as max speed for max load.

However, Berger lists their loaded ammo pushing almost 3000fps with the same bullet. I can hear that I have room in the case for more powder. I went up to 92 grains and hit 2860fps, but started to see a scratch on the base of the brass around the primer hole.

I'm noticing speeds get very close to each other between 90-90.5 grains. I'm thinking that where I will find the best accuracy.

What should i expect for speed?

Thanks
 

338 dude

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Started reloading a new Savage 338 Lapua with a 26" barrel. Speeds checked using Magnetospeed V3.

I get 2800 fps with 90.3 grains of H1000. Seated to mag length (3.750"). Does not seem over pressure, but most load books list 2800 fps as max speed for max load.

However, Berger lists their loaded ammo pushing almost 3000fps with the same bullet. I can hear that I have room in the case for more powder. I went up to 92 grains and hit 2860fps, but started to see a scratch on the base of the brass around the primer hole.

I'm noticing speeds get very close to each other between 90-90.5 grains. I'm thinking that where I will find the best accuracy.

What should i expect for speed?

Thanks
H 1000 will work but it’s a little on the fast side, slower powders will give you better velocities
image.jpg
 

ARlife4me

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33, lrt and 570 for higher speeds. Magnum might be a better choice for 250 weight? As the 3 I stated in the 1st sentence might be better for 270 and up. For 250's I'm going to give 7828ssc, 7977 and magpro a try.
 

338 dude

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33, lrt and 570 for higher speeds. Magnum might be a better choice for 250 weight? As the 3 I stated in the 1st sentence might be better for 270 and up. For 250's I'm going to give 7828ssc, 7977 and magpro a try.
I pressured out early with mag Pro speeds were very low barely tapped an 8 pound keg ,do you need one?
 

338 dude

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Last edited:

338 dude

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Here’s another with reloader 26 and a little velocity info going up the ladder
image.jpg
 

Rum Man

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338 Edge h'1000 300 gr bergers @ 2884 ft.per.sec 30 " barrel

338 Rum h-1000 , 300 gr bergers @ 2883 ft.per.sec 30" barrel

338 Rum , 24" carbon , 250 gr bergers , re-26 @ 2997 ft.per.sec best accuracy. Hit 3087 ft.per.sec but es and sd way off .

Havent tryed any Re-33 powder yet in any 338's . I finally got some , so testing to follow!
Along with , LRT , 8133 , & re visit the re-26 powder .

Keep us posted ! Good Luck!

Rum Man
 

Rum Man

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Never tryed Tumbo! It's been very scarce .

I forgot a factory 338 Rum info
26" barrel H-1000 , 285 eldm's @ 2800 ft.per.sec. accuracy was amazing . No data on a kill ..

Rum Man
 

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