Winchester vs WSM

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Winchester vs WSM

Postby MAX4Utah » Wed Mar 23, 2011 8:31 pm

What are the advantages to a short mag caliber? I would be interested in 270 vs 270 WSM.

I know there is not quite the selection of ammo and it is a bit more expensive (i do not re-load...yet). I am narrowing my rifle selection down to 270, 270 WSM and 30-06. The gun will mainly be used for mule deer and elk. I do plan on shooting it a fair amount otherwise.
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Re: Winchester vs WSM

Postby ajmorell » Thu Mar 24, 2011 7:35 am

In 270 caliber there isn't much of any advantage IMO. Ballistically they are nearly identical, but the short mag is about twice as expensive to shoot. The only advantage for the short mag is it operates on a shorter action gun which generally translates to a little less weight. Some people will argue about making it easier to comfortably mount a scope too but I don't really think that's a consideration. If I were going to buy another 30 caliber though it would be a 300 WSM. It's ballistics are about on par with the 300 win mag but recoil is less, again ammo is quite a bit more expensive.
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Re: Winchester vs WSM

Postby apexhunter » Thu Mar 24, 2011 3:01 pm

To the contrary- there is definitely an advantage of the WSM compared to the win chambering in .270. With Fed Premium 140gr accubond loadings the ballistics are as follows:

WIN: velocity- muzzle- 2950'/sec, 200yd- 2579'/sec
Energy- muzzle- 2705'#, 200yd- 2067'#

WSM: Velocity- muzzle- 3200'/sec, 200yd- 2807'/sec
energy- muzzle- 3187'#, 200yd- 2450'#

The WSM provides a 250'/sec gain in muzzle velocity and over 480'# of energy increase with the same projectile. Some may say that much difference in velocity and energy isn't significant but wildcatters have been tweaking cartridges for years looking for just 150'/sec more velocity while remaining within safe pressures...WSM gives you much more than that.

Above and beyond the weight loss of the WSM rifle the shorter action also provides the potential for better accuracy as the shorter action is stiffer providing a consistent and solid base from which the projectile is launched.
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Re: Winchester vs WSM

Postby TomKat » Thu Mar 24, 2011 3:25 pm

I will NEVER shoot a WSM, even though I dont dispute what you wrote.

WHY?

The same reason that I don't eat hamburgers for thanksgiving...traditon dictates .270, and its even better out of a pre 64 model 70

I'm out-
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Re: Winchester vs WSM

Postby ajmorell » Thu Mar 24, 2011 3:34 pm

apexhunter wrote:To the contrary- there is definitely an advantage of the WSM compared to the win chambering in .270. With Fed Premium 140gr accubond loadings the ballistics are as follows:

WIN: velocity- muzzle- 2950'/sec, 200yd- 2579'/sec
Energy- muzzle- 2705'#, 200yd- 2067'#

WSM: Velocity- muzzle- 3200'/sec, 200yd- 2807'/sec
energy- muzzle- 3187'#, 200yd- 2450'#

The WSM provides a 250'/sec gain in muzzle velocity and over 480'# of energy increase with the same projectile. Some may say that much difference in velocity and energy isn't significant but wildcatters have been tweaking cartridges for years looking for just 150'/sec more velocity while remaining within safe pressures...WSM gives you much more than that.

Above and beyond the weight loss of the WSM rifle the shorter action also provides the potential for better accuracy as the shorter action is stiffer providing a consistent and solid base from which the projectile is launched.


Good info. The last I had looked (and obviously I hadn't looked very hard) I couldn't find much advantage in the WSM over the long action counterpart. That being said, the ammo price would be enough to steer me clear of it. If you are into reloading maybe it could be worthwhile though. In my rather limited experience (I've shot both the WSM and the 270 Win.), the WSM has a lot more recoil, in fact more than my -06 does, but I suppose that is a function of the gun it was fired out of too.
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Re: Winchester vs WSM

Postby mjk » Sun Jun 26, 2011 4:57 pm

One thing that wasn't taken into consideration with the 270 win vs Wsm debate is Hornady Superformance bullets. The playing field became a bit more equal.....

270 Win 130 gr SST® Superformance®



270 Win 130 gr SST® Superformance®
Velocity (fps) / Energy (ft-lbs)
Muzzle 100 200 300 400 500
3200/2955 2984/2570 2778/2228 2582/1924 2393/1653 2213/1414
Trajectory (inches)
Muzzle 100 200 300 400 500
-1.50 1.20 0.00 -5.70 -16.70 -33.70

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Re: Winchester vs WSM

Postby apexhunter » Fri Jul 22, 2011 6:32 am

Hornady has done a great job with the Superformance loadings but do be aware of one caveat they are taking advange of...that being to load slightly lighter projectiles to gain velocity. Obviously moving less mass allows them to increase velocity with no appreciable gain in recoil but velocity is but one aspect of ballistics with energy being the other. The 2 do go hand in hand but downrange energy is what counts in a hunting round.

Another aspect is that a WSM loading can be considered more efficient as the fire is exposed to a larger area of powder within the cartridge resulting in more of the powder being burned. Every bit of unburned powder remaining in the cartridge or being blown down the barrel means that much less energy transferring to the projectile. The WSSM cartridges took this theory even further as the cross section of the charge is very large but short resulting in even higher burning efficiency in a lighter, shorter action. This profides more potential for acuracy as the action has less flex while still providing lighter weight.
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Re: Winchester vs WSM

Postby waterfowlhunter » Wed Aug 17, 2011 5:29 am

I have had a lot of std, WSM and WSSM rifles and the WSM and WSSM definately have an advantage, one is velocity especially if you reload and you can get the higher velocity with less powder in a lot of cases. The recoil is definately less from a 300 win mag to a 300 WSM and from my experience it is easier to get a sub MOA load in a lightweight field type rifle with the short mags than the std cals. The action is not much shorter but is makes the gun "feel" a lot lighter/smaller. And you can get these velocities out of a shorter barrel. My A-Bolt has a 23" barrel compared to my Win Mag with a 26" Barrel.

Now, None of that is even necessary in the US where a good old 30-06 will do anything at any range most people can accurately shoot. But I just like them :biggrin: All of the Bear I have taken have either been with a 30-06 or a 12ga slug but I hunt deer with a 300WSM due to the open fields and ranges I hunt at. I even like it for coyotes with my 125gr loads @ 3500fps. :lol3: My next rifle is going to be an X-Bolt most likely in 325WSM.
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