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7 stw vs 7 ultra mag

 
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  #1  
Old 10-17-2012, 09:34 PM
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7 stw vs 7 ultra mag

If you load both to max charge and use the same bullet (168 berger) which barrel would have the longer life. I am going to build one of the two and want the one with the longer barrel life. I dont shoot compatition but practise alot
Thanks
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  #2  
Old 10-17-2012, 09:54 PM
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Re: 7 stw vs 7 ultra mag

Quote:
Originally Posted by remcraz View Post
If you load both to max charge and use the same bullet (168 berger) which barrel would have the longer life. I am going to build one of the two and want the one with the longer barrel life. I dont shoot compatition but practise alot
Thanks
stw by 2 to 1 or more. I've had both; the 7 rum with 140 sierras and rl25(at 3500fps) went about 600 rounds before showing some accuracy loss and shallow rifling. I traded my stw this spring at 1500 rounds or so and the last group shot sighting in a scope to trade it was .4" at 100 yards with a 140 sierra. I usually ran 140 accubonds in her with rl25(at 3450 fps). It was showing some shallowing(rifling) but still shooting .5 moa or so on average.
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  #3  
Old 10-17-2012, 09:57 PM
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Re: 7 stw vs 7 ultra mag

They are the same. I would choose the beltless case.
db
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Old 10-17-2012, 10:07 PM
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Re: 7 stw vs 7 ultra mag

15 grains more powder for the same velocity is NOT the same. It's a hell of a lot more heat and scouring for virtually nothing. I like the 7rum and will probably own one again, but it will be a dedicated lr rig with extremely low round count. You can actually use your stw and still keep it shoting well. I owned my last one ten years. My current one had 200 rounds and change on it and the barrel shows no wear, even heating it bad in hot weather this year. That would have killed a 7rum. If you want a rum you can put rounds through, you have to step up to 300 rum.
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  #5  
Old 10-17-2012, 10:12 PM
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Re: 7 stw vs 7 ultra mag

Yeah, that's what I did, sold my 7 and stepped up to a 30.
db
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  #6  
Old 10-17-2012, 10:23 PM
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Re: 7 stw vs 7 ultra mag

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Originally Posted by dbhostler View Post
Yeah, that's what I did, sold my 7 and stepped up to a 30.
db
me too; I use the stw in 7mm and 300 rum for beltless. I'm thinking of a 7rum the local shop has for 6 bills in ss with a good barrel, but it is a righty. I don't think I'd get more performance than my lh stw though.
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  #7  
Old 10-17-2012, 10:33 PM
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Re: 7 stw vs 7 ultra mag

The 7 RUM has the largest case capacity of any commercially loaded case, but their ballistics are about the same. Don't know the price of cases if you roll your own and the availability of loaded ammo if you don't.
tc
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