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

[WEATHERBY460]

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

 

[C.O. Shooter]

I was pushing 2850 with the 300 Gr. EOLs (91 grains H1000). I'd imagine/assume you would be at 2900. However, barrel length is in my favor at 30". How many rounds on your barrel?

 

[338 dude]

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

 

[C.O. Shooter]

For your setup I'd try R33. You should see an increase.

 

[ARlife4me]

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]

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]

H 1000 will work but it's a little on the fast side, slower powders will give you better velocitiesView attachment 375826

H 1000 will work but it's a little on the fast side, slower powders will give you better velocitiesView attachment 375826

with reloader 33 3175fps

 

[338 dude]

Here's another with reloader 26 and a little velocity info going up the ladder

 

[Rum Man]

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

 

[WEATHERBY460]

Wow, maybe I should try the 33. What about Retumbo?

 

[Rum Man]

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

 

[338 dude]

Wow, maybe I should try the 33. What about Retumbo?

That has been my go to for years in my 338 Lapua 94 Grains of Retumbo,with the usual warning work it up from lower

 

[Willys]

https://www.longrangehunting.com/threads/250-bergers-with-retumbo-and-338-lapua.302759/

 

[huntinfool18]

I get just over 3000 with a 250 Berger and retumbo in my 338 rum. I would think a lapua should get close to or more