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300 Win vs 300 RUM vs 30-378 Weatherby

 
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  #36  
Old 09-09-2013, 04:14 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

So going with a 7mm RUM would not be better than a 300RUM?
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  #37  
Old 09-09-2013, 04:47 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

Quote:
Originally Posted by Deerhntr71 View Post
So going with a 7mm RUM would not be better than a 300RUM?
No, a 300 RUM can push a 215 Hybrid about the same velocity a 7 RUM can push a 180 Hybrid with the about same amount of powder. And the 7 RUM will be much harder on throats than the 300 RUM.

And... bigger bullets make bigger holes.
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  #38  
Old 09-09-2013, 05:56 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

+1 MontanaRifleman word for word!!

+ 35grs more bullet means !!MORE!! energy, ft-lbf

Quote:
Originally Posted by MontanaRifleman View Post
No, a 300 RUM can push a 215 Hybrid about the same velocity a 7 RUM can push a 180 Hybrid with the about same amount of powder. And the 7 RUM will be much harder on throats than the 300 RUM.

And... bigger bullets make bigger holes.
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  #39  
Old 09-09-2013, 07:58 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

Quote:
Originally Posted by Trickymissfit View Post
Isn't the .338WSM pretty much the same as the .338RCM? The optimum over all length is going to be much longer than the .300WSM due to the bullet length alone (unless the end use pushes it way back into the shoulder area, and that's not good). The Remington 700 short action is known to be a little on the short side anyway, and one might be better off with a standard length action. Or maybe use a Savage action instead (I measure between .160" and .180" longer). Even the short Winchester is longer by about .100". Have no idea about the Browning, so won't guess.

What somebody needs to do is to make basic WSM brass in something like a 2.31" length. Then you could add about .125" to the shoulder length and finish out with a 2.284" over all length. I think the added .125" length in case capacity would make a serious improvement, but yet still fit in a standard length action. I see this as a win, win! Specially with a .338 caliber.
gary
Very close. I do not know the exact dimensions on the 338 RCM but they have to be very close.

Wyatts makes a 3.000" extended mag box that you can install that offers enough length for the 338 WSM but with tipped bullets or match bullets, its VERY tight and you really have to pay attention to your throat design to be able to reach the lands and still fit in the mag but it can be done.

I built a browning earlier this year in a 338 WSM with a very short throat and it worked very well with the 200 and 225 gr Accubonds.
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  #40  
Old 09-09-2013, 08:01 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

Quote:
Originally Posted by Deerhntr71 View Post
So going with a 7mm RUM would not be better than a 300RUM?
Better in what way? Barrel life, 300 RUM certainly the way to go. Heavier game, 300 advantage, big game at longer ranges, 300 has the terminal advantage.

If you just want a big, bad ***** 7mm, the RUM is great. This is coming from someone that designed and uses the 7mm Allen Magnum which makes the 7mm RUM look a bit tame and I LOVE IT!!!

More practical minds would go 30 cal.... THey would probably be right, probably......
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Kirby Allen(50)

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  #41  
Old 09-09-2013, 11:32 PM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

Quote:
Originally Posted by MontanaRifleman View Post
The 300 WSM and 300 Dakota are both based of the 404 Jeff (as well as the 300 RUM. I have case for all 3). The WSM has a 2.100 overall length and the Dakota is 2.550. It has a couple more grains capacity than the 300 WBY and I .275" shorter. The Dakota is about as long as you can get into a standard action with long high BC bullets without seating them back into the case.
I was thinking about case that is 2.284" over all length, but with something like a 1.93 shoulder length with a 35 degree angle. This should do well with a .338 diameter bullet as well as the .308 diameter bullet. With case shrinkage from fire forming, you should still be OK. It'd also be really nice in 7mm!
gary
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  #42  
Old 09-11-2013, 10:20 AM
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Re: 300 Win vs 300 RUM vs 30-378 Weatherby

I have read on other sites that the 7mm RUM is also hard to reload, you really have to watch the pressure, it is not for someone just getting started reloading like me? Is this true and is the 300 RUM the same way or is it easier to load?
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