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300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

 
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  #15  
Old 04-14-2013, 10:58 PM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

When doing load work for my WSM, I worked up for the 210 Berger using RL17 and max'd @ 2935 which is within 200 fps of what I could push the 210's in my 300 RUM using Retumbo. So based on my experience, with the right powder a WSM can push the heavier bullets quite well. Another good reason to choose the WSM is the barrel will last a lot longer than the WBY or RUM and so will the brass.
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Old 04-15-2013, 10:02 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

Quote:
Originally Posted by MontanaRifleman View Post
When doing load work for my WSM, I worked up for the 210 Berger using RL17 and max'd @ 2935 which is within 200 fps of what I could push the 210's in my 300 RUM using Retumbo. So based on my experience, with the right powder a WSM can push the heavier bullets quite well. Another good reason to choose the WSM is the barrel will last a lot longer than the WBY or RUM and so will the brass.
Looking at the chamber drawings of the .300 WSM and the .300WBY, one sees a great difference between the neck length so the two rounds. One has a 35 degree shoulder and the other figures out to be around 45 degrees. The vortex of the flame pathe in the WSM case is just inside the front of the lip in the neck. Better than some, but no where as good as the Weatherby neck design. The WBY mag uses about 12% more powder to gain over two hundred feet persecond in velocity (probably more). The longer neck seriously comes into play when you start using 220+ grain bullets

I doubt there's many folks that are going to know the difference in barrel life between the WSM case and the WBY case, but who knows? Personally, I'd take the .308 Norma over either one of them
gary
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Old 04-15-2013, 11:05 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

The case drawing I am looking at on Ammoguide shows the WBY with a 20* shoulder. It does have a slightly longer neck by about .023, but the WSM's sharper shoulder and sharper neck/shoulder junction (vs the radius WBY junction) I would think more than make up for the length difference. The RUM neck is close to the WBY in length but has a sharper 30* shoulder.

I have never burned out a barrel in WSM, WBY or RUM so all I can go by is what I hear and read and I have heard and read WSM's get good barrel life in the 2000-3000 round range whereas the RUM maybe a 1000 or more with the WBY maybe a little more than the RUM.

If a WBY can push a 210 bullet 3130 fps, that would equal the 300 RUM performance (in a 26 barrel).
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  #18  
Old 04-16-2013, 02:22 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

I would also go with the Weatherby. Had my choice when I ordered a custom rifle a few years back and debated for a long time the choice. The more experienced western hunters I talked to the more 300WBY rose to the top.

Not to change your mind but if you are planning on loading for it, I would look at something in the 7MM (stw,wsm,rum) line of rifles as the 30cal stuff has been pretty hard to come by during this latest frenzy. I have always seen 7MM stuff around when looking at bare shelves where 30 cal stuff used to be.
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  #19  
Old 04-16-2013, 09:42 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

I would go with the 300 RUM, I personally have one and I love it. You say no more then 700 yards, but if a big one steps out at 800 I am willing to bet you're trigger finger is going to be itching for him. Kick is a little much for some people but I have a break on mine so its actually fun to shoot. Great knockdown power! Good luck
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  #20  
Old 04-16-2013, 09:55 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

Quote:
Originally Posted by MontanaRifleman View Post
The case drawing I am looking at on Ammoguide shows the WBY with a 20* shoulder. It does have a slightly longer neck by about .023, but the WSM's sharper shoulder and sharper neck/shoulder junction (vs the radius WBY junction) I would think more than make up for the length difference. The RUM neck is close to the WBY in length but has a sharper 30* shoulder.

I have never burned out a barrel in WSM, WBY or RUM so all I can go by is what I hear and read and I have heard and read WSM's get good barrel life in the 2000-3000 round range whereas the RUM maybe a 1000 or more with the WBY maybe a little more than the RUM.

If a WBY can push a 210 bullet 3130 fps, that would equal the 300 RUM performance (in a 26 barrel).
you have a bad set of drawings. Virtually all Weatherby cases are in the 45 degree range. If you go from the centerline of the radius, you will see a neck closer to .38".
gary
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  #21  
Old 04-16-2013, 10:02 AM
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Re: 300 Weatherby Mag. vs. 300 Ultra Mag. vs. 300 WSM

So many options.

I'm sure any of the Sort Action Magnums, Long Action Magnums or Ultra Magnums in .30 caliber will do what you want. Factory rounds are available for all but it might be worth considering what you could get when out of town. 300WSM and 300WM will both be found at wally world once the supplies return.

I have shooting and reloading experience with a couple of the suggested calibers.

If it were me, I would keep in mind impact power (foot lbs), using a metric of no less than 1000 puts them all pretty close.

I have a 300WSM. 3 touching at 300 yards is all up to me. Factory Copper is still sub MOA.

I don't have a 300 Win Mag but all the books and programs have the WM and WSM very close. Just long action vs. short action.

I am loading for a 300RUM. Christensen Arms all carbon fiber. Definite sub 1/2 MOA with copper. Clover leafed at 300 yards on new gun rounds 14,15,16. Testing since them has been in high winds but still sub MOA at 300 yards including horizontal.

I don't have any info on loading/hunting the 300 Weatherby but if you go that route, I'd suggest buying a Weatherby. I live near Paso Robles and visited Weatherby last week. FWWIW, my 300WSM is a rebarreled Weatherby.

My next 'big' build is a 338 Edge on a Weathery action but it will be a target/tactical rifle.


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