338 Sherman max vs 338 WSM

dogz

Well-Known Member
Joined
Jan 11, 2006
Messages
490
Location
SWMT
I have built 2 .338/7WSM’s both are pushing the 250 Berger’s at 2920-2950 with rl16, on tikka actions.


Holy hanna, you've got to be running a really long barrel!

I've had a 338/300 WSM for about 20 years. I could PUSH it to 2700 when the barrel was @ 23" with 250's.....but I was really honking on it
 

Aoudad shooter1975

Well-Known Member
Joined
Sep 4, 2017
Messages
1,070
Location
Blanco, Texas
I haven't hunted with the 285's, but I have loaded them in my 9 twist .338 Norma mag. I'm not much on pushing pressure in that gun, and with a conservative load was running around 2800 out of my 24" barrel. They load easy, and shoot well, thats about all I can comment on. And they are nearly 2" long, if you want to run heavy monos exclusively, maybe consider an 8 or 8.5 twist, and a bigger cartridge.

I shoot 285 ELDs in my 338 Norma...I have a 1-9.4 proof 24 in...and my load at 2,000 feet elevation is 2755 fps...it is not extreme by any means but not on the lower end either...
 

Aoudad shooter1975

Well-Known Member
Joined
Sep 4, 2017
Messages
1,070
Location
Blanco, Texas
Holy hanna, you've got to be running a really long barrel!

I've had a 338/300 WSM for about 20 years. I could PUSH it to 2700 when the barrel was @ 23" with 250's.....but I was really honking on it

What I was thinking too...my RCMs are way off that...with 225 monos CEB lasers I barely get 2700...but mine are out of 20 in barrels
 
Last edited:

codyadams

Well-Known Member
Joined
Jan 7, 2015
Messages
3,234
Location
Southwest Wyoming
I shoot 285 ELDs in my 338 Norma...I have a 1-9.4 proof 24 in...and my load at 2,000 feet elevation is 2755 fps...it is not extreme by any means but not on the lower end either...
Ya, the hammers didn't pressure up as much as I suspect a hornady would. I think it was like 2780-2790 or so? Using VV-N570. The 265 ablr only got to 2900 or so
 

Sid Post

Well-Known Member
Joined
Jul 27, 2007
Messages
169
Location
Texas, USA
I'm more of a 338/06AI person myself. My shots are not that far off so, I'm not convinced a 338 magnum de jour would be a better cartridge for what I shoot.

My inner-Walter Mitty says a 338 boomer would be just the ticket but, a shot past 200 yards is a rare one for me these days, at least for hunting game animals. If I'm at the 600 yard line target shooting, these days I'm generally shooting smaller rounds than the ubiquitous 308Win. Heck, I've been thinking about a 257Roberts to complement a 7x57 and 6.5x55. :cool:
 

dogz

Well-Known Member
Joined
Jan 11, 2006
Messages
490
Location
SWMT
I went away from my 338/300 WSM and went to the 338/06. Mine's on an old G33/40 with a Chanlynn barrel, a true hunt machine!
 

D-mon

Well-Known Member
Joined
Aug 11, 2003
Messages
108
Location
Scotland
sooner or later, we'll have available to us pressure testing systems that are reasonably affordable. Can't wait for that day!

As one of my best friends says "pressure equals speed, and speed equals pressure"...........:)
Such device exist. The Kolbe Pmax system created in the early 2000 was doing the job well. But I believe did not reach a market interested enough at the time. There was a patent on that device.
 

gregsjt

Well-Known Member
Joined
Jan 31, 2015
Messages
153
What I was thinking too...my RCMs are way off that...with 225 monos CEB lasers I barely get 2700...but mine are out of 20 in barrels

20" 338 RCM seems like a good combo of a lightweight gun with heavy bullets. Its too bad that round didn't catch on. Isn't it close to a 338 Win Mag in short action?
 

Aoudad shooter1975

Well-Known Member
Joined
Sep 4, 2017
Messages
1,070
Location
Blanco, Texas
20" 338 RCM seems like a good combo of a lightweight gun with heavy bullets. Its too bad that round didn't catch on. Isn't it close to a 338 Win Mag in short action?

I love it...it is a lot of thump that is usable. With a 18-20 in barrel and a suppressor and a 225-230 grain bullet...it is awesome about 90% of 338 win with a barrel that is 4-6 inches shorter...yeah I bought 350 pieces of brass so I should be good for some time...
 

dogz

Well-Known Member
Joined
Jan 11, 2006
Messages
490
Location
SWMT
20" 338 RCM seems like a good combo of a lightweight gun with heavy bullets. Its too bad that round didn't catch on. Isn't it close to a 338 Win Mag in short action?


Generally about 200 fps diff, if run at similar pressures and barrel lengths
 

Rifleman97

Well-Known Member
Joined
Dec 28, 2017
Messages
224
Well I can tell you I see WSM brass at gun stores all the time, and I’ve never seen 338 Sherman brass at any in store location. If you’re already thinking the short mag, brass availability is a big enough reason for me to go that route, even ignoring any velocity difference between the two, as both are very capable rounds at hitting targets and killing animals provided you do your part.
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 

Recent Posts

Top