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7 wsm vs 7 rsaum-- that is the ?

 
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Old 05-14-2007, 10:23 PM
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7 wsm vs 7 rsaum-- that is the ?

Ive ordered all the significant parts for my 1000 yd rifle...I still cant find enough info on which case is the best to use?! Of course I'm still able to choose as the barrel hasnt arrived. Please help me out and tell all the pluses and misses of both!! Thanks
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Old 05-15-2007, 01:55 AM
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Re: 7 wsm vs 7 rsaum-- that is the ?

better brass WSM,better suited for short action RSAUM,,I doubt either is much if any better than the 280AI.
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Old 05-15-2007, 06:55 AM
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Re: 7 wsm vs 7 rsaum-- that is the ?

I was considering the same about 2 years ago. I ended up going with a 7WSM based off a 270WSM Norma case. Kirby (Fiftydriver) did the gunsmithing. his reamer for this chambering has a very long throat making it not suitable for a short action, but if you are building a single shot or have a long action it is an incredible round. it is throated perfect for the 160gr Accubond my rifle fires them at 3185fps recently I have been testing the 180gr Berger at 2895fps with a standard deviation of 3, a B.C. of .684 making this combo hard to beat at 1000yds.
UB
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Old 05-16-2007, 06:12 PM
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Re: 7 wsm vs 7 rsaum-- that is the ?

I agree....wsm
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Old 05-17-2007, 09:42 AM
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Re: 7 wsm vs 7 rsaum-- that is the ?

[ QUOTE ]
better brass WSM,better suited for short action RSAUM,,I doubt either is much if any better than the 280AI.

[/ QUOTE ]

The SAUM actually has exactly the same case capacity as the .280AI. If you look in the Nosler #5 manual you'll see that the load data for the SAUM and .280AI are also nearly identical (as is velocity). One just functions out of a Short Action, the other doesn't.

Also, in regards to throating a WSM long to achieve better performance, I believe that is a misconception too. You can throat them longer to accept VLD style bullets and function out of the magazine... but increased velocity is not usually achieved. There's an article in Rifle magazine by Chub Eastman of Nosler where they chambered a barrel with the standard WSM reamer and then re-chambered it with a longer throat and saw virtually no increase in velocity. It would help to throat it long if you were designing it to shoot the heavier VLDs I guess, although I don't know how much. ~JT
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Old 05-17-2007, 11:39 AM
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Re: 7 wsm vs 7 rsaum-- that is the ?

I'm no expert on the subject, but I think 3185fps with the 160g AB and 2900fps with the 180g VlD is a substantial increase in FPS vs. the standard WSM throating and the long throated version uncleB is talking about...

In other words, no regular 7 WSM is going to achieve those kinda velocitys in a standard production rifle...Thats at least 150fps faster then what there usually running with those bullet weights...
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Old 05-17-2007, 12:59 PM
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Re: 7 wsm vs 7 rsaum-- that is the ?

[ QUOTE ]
I'm no expert on the subject, but I think 3185fps with the 160g AB and 2900fps with the 180g VlD is a substantial increase in FPS vs. the standard WSM throating and the long throated version uncleB is talking about...

In other words, no regular 7 WSM is going to achieve those kinda velocitys in a standard production rifle...Thats at least 150fps faster then what there usually running with those bullet weights...

[/ QUOTE ]

My factory 7mm WSM does about 3150 fps with 150 Nosler partitions and barely breaks 3000 fps with the 160's.
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