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338 lapua powder

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Unread 05-07-2003, 09:05 PM
Junior Member
Join Date: Apr 2003
Posts: 25
338 lapua powder

what is the "best" powder to begin using in a 338 lapua project, i will be starting with the 250 grain smk
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Unread 05-08-2003, 06:16 AM
Silver Member
Join Date: Dec 2002
Location: Finland
Posts: 179
Re: 338 lapua powder


I just happened to call Erkki Kauppi at Sako Finland this morning. [img]images/icons/smile.gif[/img]

I was asking about their experiments with TRG-S and SMK 300s and he said that he was looking at a paper in a wall that said 300 meters / five shots. And somehow it also said SMK 300 grain. [img]images/icons/smile.gif[/img]

The boys at the factory had been playing around with a standard TRG-S, there was one hole in that paper. No official testing. But I guess I can share this

He gave me the load without asking:

84.9 grains Vihtavuori N 165,velocity was 2630 fps. The pressure had been measured too, it was okay ,I forgot to write it down.Hmm..same with the primer brand... [img]images/icons/rolleyes.gif[/img]

So I will try my loads with that powder for sure,he said that N 560 might be even better.

My TRG-S has a custom Sako brake,out of the box it shoots 1/2 MOA with Lapua Scenar 250 factory ammo. I got it a week ago,since then I have been shooting and surfing the Net to find the best bullets to try... no reloading yet, the dies that I had reserved had been accidentally sold. Havenīt even chronoed it yet.

Nice caliber,huh? [img]images/icons/smile.gif[/img] What brand is your rifle?

EDIT: This load is over the max in Vihtavuori data book. E. Kauppi or myself are in no way responsible for possible problems,the test rifle was like this but no brake.

My new toy (could not help):


[ 05-08-2003: Message edited by: Petander ]
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Unread 05-08-2003, 06:35 AM
Platinum Member
Join Date: May 2001
Posts: 2,369
Re: 338 lapua powder

I've used RL22 with the 250's and RL25, VV N165 and Retumbo with the 300's. I believe RL25 and Retumbo are about equivelant.
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Unread 05-08-2003, 06:36 AM
Junior Member
Join Date: Apr 2003
Posts: 25
Re: 338 lapua powder

i am having one built, just trying to get the dies, brass, lead, ect
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Unread 05-08-2003, 09:22 AM
Bronze Member
Join Date: Jan 2002
Location: New Mexico
Posts: 67
Re: 338 lapua powder

Try surplus 872....I'm useing a 33" tube with the 300MKs in a Mark 5 WBY and 250s in an AR30 with a 26" tube...Very good accuracy...I'm going to go to 4831sc with the 250s in the AR30 and expect a little more speed...
Honest Charlie
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Unread 05-09-2003, 09:32 AM
Silver Member
Join Date: Dec 2001
Posts: 469
Re: 338 lapua powder

I'm using H1000 under the 300 grain matchkings with pretty good accuracy and velocity. I'm using a 338 lapua Timberwolf with a 26" barrel.

I just picked up some retumbo and I am going to try some loads with it and some REL 25. I'll post results.
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Unread 05-09-2003, 07:37 PM
Bronze Member
Join Date: Feb 2002
Location: Houston, TX
Posts: 93
Re: 338 lapua powder

I am also trying to collect as much loading that I can possibly find for the .338 Lapua.
(I have the VihtaVuori reloading book since the Lapua book won't be available until June.)

Does anyone have .338 lapua dies in stock? Currently I have a set of Forster Ultra-BR dies on order which should be in my hands in the next two weeks or so. (a few weeks wait) I am still on the lookout for a good neck sizing die, Forster doesn't list an application yet. A fellow recommended a Lee Collet die, $50 and another waiting period since it will be custom.

I have some 250g Lapua lockbase cartridges to start off with then it's going to be fed some 250gr Scenars... I haven't even shot the rifle yet since I am still waiting for my scope ring lapping bar. (Yet another AR-30 owner with the 26" barrel and a mini-howitzer muzzlebreak.) From looking at a powder burning rate chart I will try the VV N165 powder first. Then if space in the case still exists without compressinggoto the N170 as they both have slow burning characteristics.
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