300 wsm short barrel

brockel

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Feb 8, 2017
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Baker,mt
Anyone running an 18” or similar barrel length in 300 wsm? Thinking about building a shorty on a tikka to run suppressed. Would go 30 nosler if had any other action. What velocities are you seeing with 200+ grain bullets?
 

Jimbee

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Mar 16, 2020
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2637fps with an 18" wsm. 200.20x bergers with H4831. Haven't messed around trying different powders/loads yet. 9inch TB. 1:9 twist
 
Joined
Nov 6, 2022
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Not sure of velocity but I get excellent groups with 220gr hornady rnsp and 71gr mag-pro out of a 20” barrel
 

shax2lex

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Dec 23, 2020
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I’m building a 20” Proof barreled 300WSM and I want to shoot 200ge ELDx bullets. Do y’all think I can hit 2,850fps with H4350?
 

B23

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I’m building a 20” Proof barreled 300WSM and I want to shoot 200ge ELDx bullets. Do y’all think I can hit 2,850fps with H4350?
You could maybe get there if you're standing on the gas really hard but I wouldn't expect your brass to hold primer pockets very long.
 

shax2lex

Lil-Rokslider
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Dec 23, 2020
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I’m hoping for some feedback.

I recently got that 20” Proof Carbon barrel for my Terminus Zeus QC action, and am shooting 200gr ELD-X. I’ve previously reloaded other calibers so this isn’t my first time. I’ve reloaded 6.5x47Lapua and 6.5CM. Just not 300WSM.

I did some load work up yesterday.

I got 2,760fps with my barrel and TBAC Ultra 9 can shooting H4350 at 63.5gr, Norma brass, CCI 250 primers. I checked the brass and there is a slight ejector swipe. Primers look good and the bolt is easy to lift. I can’t tell if I’m over pressuring it. I shot factory 180gr Norma Bondstrike (got 2,890fps) and the brass looks the same way.

Thoughts?
 

Fishmaster196

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Dec 18, 2018
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Michigan
I use 63 grains of H4350, Norma brass, Federal Mag primers and 168 grain Barnes ttsx’s. I get an easy bolt lift and slight ejector swipe marks.
I think Norma brass may be a little soft. I get swipe marks on their factory 300 wsm Bondstrikes also.
 

madcalfe

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May 9, 2019
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British Columbia
63.5gr H4350 seems like a lot of powder for 200 ELDX
I'm using 64gr H4350 with 178gr ELDX and that's pretty much maxed out on my custom 20" 300wsm
 

ZWA

Lil-Rokslider
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Jan 22, 2022
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Back to the OP’s question is there anymore data for 18” setups? Thinking about the same build for myself with either the 200.20x or 180EH and a Nomad LT.
 

sportsmans challenge

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Alaska92

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Oct 14, 2023
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The 300 RCM is much more suited for short barrels than a WSM. In fact, it is arguably superior in a few different ways. If you are going to put a rifle together as opposed to finding a factory rifle, it‘s a no brainer. It may be an issue if you don’t handload as RCM ammo is a unicorn in many areas. Short (20”)/ lighter contoured barrels are what the RCM’s were designed for. They don’t have rebated rims. Case diameter allows for one more round in the magazine than most WSM magazines. To name a few benefits.
 

ZWA

Lil-Rokslider
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Jan 22, 2022
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Well, I just ordered an 18'' 300wsm barrel from CarbonSix to go on my TL3. I have a 24'' proof sendero on it now but that thing is a broom stick with the Nomad LT on it. @Alaska92 thanks for the comments on the RCM, I have brass and dies for the WSM already so it was a no brainer.
 

Alaska92

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Oct 14, 2023
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Well, I just ordered an 18'' 300wsm barrel from CarbonSix to go on my TL3. I have a 24'' proof sendero on it now but that thing is a broom stick with the Nomad LT on it. @Alaska92 thanks for the comments on the RCM, I have brass and dies for the WSM already so it was a no brainer.
Copy. It sounds like you‘re set up. I like to mention the RCM’s from time to time because I think they are often overlooked without merit. They have attributes that are not completely understood.
 
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shax2lex

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Dec 23, 2020
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125
Well, I just ordered an 18'' 300wsm barrel from CarbonSix to go on my TL3. I have a 24'' proof sendero on it now but that thing is a broom stick with the Nomad LT on it. @Alaska92 thanks for the comments on the RCM, I have brass and dies for the WSM already so it was a no brainer.
Post that pic when you get the rifle built.
 
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