Wanting more velocity out of 338 WSM

bigngreen · 2025-01-15T20:13:32-0600

fseaman.js said:
They keep chambering specs "secret" so can't model in QuickLOAD.

Never had a problem with them in QL, measure them up and punch them in then load them up. Really don't find QL over all that useful, neat but not needed.

Looks like Varget, R17, H4350 speed powder will be a good focus. In the short fat large cal throating out gains you a lot.

tonechaser88 · 2025-01-15T21:03:24-0600

wvbearhunter said:
Have you tried H1000?

I have not tried H1000, I have some though I wasn't sure if it would be too slow.

tonechaser88 · 2025-01-15T21:23:43-0600

med358-boise said:
what velocity and accuracy are you getting now?

Accuracy has been incredible. Its a custom Barrel by Hells Canyon armory out of Idaho. Velocity has been 2675 after I dropped it down a couple grains after getting pressure from 2nd fired brass.

Earnhardt · 2025-01-15T21:27:40-0600

tonechaser88 said:
Accuracy has been incredible. Its a custom Barrel by Hells Canyon armory out of Idaho. Velocity has been 2675 after I dropped it down a couple grains after getting pressure from 2nd fired brass.

What is the freebore on your chamber?

Are you jamming the bullets hard?

Thanks

tonechaser88 · 2025-01-15T21:29:29-0600

fseaman.js said:
@tonechaser88

Do you buy powders online or locally?
What is in your available list?

I use Midway to indicate what can be had even though I may not get it from them. I only listed if it seemed to be an improvement. Some available powders are not by QL figurin.
Hodgdon H4350
Hodgdon LVR
Reloader TS 15.5
Winchester 760

There are other powders that may work but where to get them from?

I have a local shop here that keeps a very good supply. I have H4350 and Win760. I might go back and see if he has RL17 in stock as that seems to be one of the most mentioned for maybe a slight boost in velocity without going to a slow burner. A friend of mine mentioned 6.5 StaBall which has done good on velocity and consistency for him, its a smidge slower than H4350.

tonechaser88 · 2025-01-15T21:31:55-0600

Earnhardt said:
What is the freebore on your chamber?

Are you jamming the bullets hard?

Thanks

Sadly, I have no idea. I had the gunsmith make that decision based on what I was trying to achieve with this build. I can tell you I'm seated out to mag length on an AICS mag. I am not jamming bullets for sure.

Earnhardt · 2025-01-15T21:35:17-0600

tonechaser88 said:
Sadly, I have no idea. I had the gunsmith make that decision based on what I was trying to achieve with this build. I can tell you I'm seated out to mag length on an AICS mag. I am not jamming bullets for sure.

What is your cartridge COAL?

Can you post a pics of a loaded bullet?

(1) Before loading it into the chamber, and (1) pic after removing the unfired round.

Does the bullet have rifling marks on it, when you remove the unfired round from the chamber?

ruby76 · 2025-01-15T21:50:02-0600

Are you using magnum primers? I'm using F210M now which reduced pressure signs in my 338SS. With the 230 eldx and H4350 F210M and a 25" barrel I was at 2770. I'm now using H4350 with 210 Barnes at 2850 and chopped my barrel down to 22"

tonechaser88 · 2025-01-15T22:24:35-0600

ruby76 said:
Are you using magnum primers? I'm using F210M now which reduced pressure signs in my 338SS. With the 230 eldx and H4350 F210M and a 25" barrel I was at 2770. I'm now using H4350 with 210 Barnes at 2850 and chopped my barrel down to 22"

I am using magnum primers, same F210M

tonechaser88 · 2025-01-15T22:34:59-0600

Earnhardt said:
What is your cartridge COAL?

Can you post a pics of a loaded bullet?

(1) Before loading it into the chamber, and (1) pic after removing the unfired round.

Does the bullet have rifling marks on it, when you remove the unfired round from the chamber?

tonechaser88 · 2025-01-15T22:39:26-0600

I am at 2.945" and was at 2650 with 59.5 gr H4350 with no pressure and sticking cases. I was 62.4 gr h4350 on first firing at 2760.

ruby76 · 2025-01-15T22:41:31-0600

tonechaser88 said:
I am using magnum primers, same F210M

I was having issues when using F215M's.

rickiesrevenge · 2025-01-15T22:43:29-0600

I'm not saying its a direct comparision, but in my 35WSM I'm running h4895 with 225 AB. 2700fps with a 14" lilja barrel. I tried Varget, IMR 4895, H4985, and I think RL15. IMR got great speed but crap accuracy. H4895 was the best combo. Varget was a close second.

gpaw94 · 2025-01-15T22:45:53-0600

bigngreen said:
You might research what the 338 Sherman short guys are using, going to be very similar.
Throating is huge in this type of application too.

Isn't the Mega a closer loading than the SS?

Wanting more velocity out of 338 WSM

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