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300. WSM vs 300. Win mag

 
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  #8  
Old 06-09-2013, 08:25 AM
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Re: 300. WSM vs 300. Win mag

I tend to agree with Lloydsmale. I have a 300WSM that I like, but I think the 300WM is the way to go if you are looking at >180gr bullet weights. This is especially true if you are building/buying the WSM on a short action, as you will be more constrained on OAL and magazine length.

If I had it to do over I would go 300WM.
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  #9  
Old 06-09-2013, 10:37 AM
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Re: 300. WSM vs 300. Win mag

On velocity and weight of bullets, this is my experience with a 300 WSM. With H4350 I can push 180 (E-Tip) bullets about 3000. With RL17 I can push them about 3400. I can push 210 Bergers about 2935. This is out of a 24 3/8ths Sako barrel. I was shooting my WSM once and the gut next to me was shooting his WM. He wanted me to chrono his load which was a 180 bullet and RL22 so he asked me to shoot a couple over my Prochrono. The velocity of his load from a 26" barrel was identical to my load from a 24 3/8 barrel, 3400 fps. As pointed out, the chamber of of the WSM is shorter than the WM by almost exactly .5", so the actual difference in bore was about 1".

With RL17, the 300 WSM becomes the equivalent of the 300 WM. I haven't heard of many using RL17 in the WM, but I'm guessing it would give higher velocities. With the standard powders, the WM is going to get about 100 fps or so more velocity than the WSM.

As for accuracy, my rifle is a Sako lemon and wont shoot anything well. But I don't believe there is any inherent difference in accuracy between the two cartridges and is much more dependent on barrel and rifle. Both cartridges have been used successfully in BR.

I personally don't care for belted cases because there is no reason to have a belt (unless for head spacing in the 375 H&H) and I like a clean case wall.

I think the 300 WSM is a fine cartridge and if you use a good barrel and smith you would have a fine fine shooting rifle for all around big game hunting in NA. Same could be said for the WM. Take your pick.
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  #10  
Old 06-09-2013, 07:00 PM
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Re: 300. WSM vs 300. Win mag

Horse a piece- buy/ build the rifle you want and don't look back. All standard 30 mags are good accuracy and within 100 fps of each other in the same rifle barrel length.
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  #11  
Old 06-09-2013, 10:54 PM
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Re: 300. WSM vs 300. Win mag

Quote:
Originally Posted by Lefty7mmstw View Post
Horse a piece- buy/ build the rifle you want and don't look back. All standard 30 mags are good accuracy and within 100 fps of each other in the same rifle barrel length.
And anyone who says otherwise is full if hooey.

Though the 300RUM is a bit faster than the 300WSM. I have one belted magnum and that's enough.

Get what turns you on.

If I had to do it over I'd still go with a 300WSM on a long action instead of short.
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  #12  
Old 06-10-2013, 04:52 AM
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Re: 300. WSM vs 300. Win mag

yup i have to agree. Between the h&h. wsm and the win its a matter of personal prefernce as what one will do so will the others. The ultra though will give an honest 2-300 fps more and is in a differnt league.
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  #13  
Old 06-10-2013, 06:58 AM
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Re: 300. WSM vs 300. Win mag

Quote:
Originally Posted by lloydsmale View Post
yup i have to agree. Between the h&h. wsm and the win its a matter of personal prefernce as what one will do so will the others. The ultra though will give an honest 2-300 fps more and is in a differnt league.
The 300 rum and 30-378 roy rounds really aren't standard mag rounds imo. They utilize a full length action, freebore, and quite a bit more case capacity than the h@h and the standard action chamberings. The 300 roy is sort of a bridge round as I don't know if it really lands in either camp. Good round though; just never needed to spend 2-3x as much for the same brass so I never went roy.
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  #14  
Old 06-10-2013, 06:16 PM
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Re: 300. WSM vs 300. Win mag

There are many 300 wsm in the 1000 bench game. My friends up here make there own off a 270wsm case and shoot great with them.Bud just built a new heavy this year and is grouping good. He told me the guy from Penn. has the small group world record right now with the 300wsm. He is gunning for him.
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