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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270. wsm vs 270 ss
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<blockquote data-quote="dirtytough" data-source="post: 1575202" data-attributes="member: 6597"><p>I've had the exact same luck. My brother built a 6.5-06ai and was getting just over 3200 fps. I built one with a 1" longer barrel and could only get 3150 fps. </p><p>Rich was getting 3070 fps with his 7ss with a 180 berger. I have to lean on my 7ss extremely hard to get 3000 fps with a 180 eld'm. </p><p></p><p>About the barrel life. Its kind of hard to compare barrel life unless the same shooter burned up both barrels. Just cause you read a claim on the internet about getting xxxx rounds down a barrel doesn't mean that shooter shot the same as another shooter getting xxx with a comparable cartridge. If you download the 270wsm to the same velocities as the 270ss it would no doubt improve barrel life. </p><p></p><p>Also is there any actual evidence of a sharper shoulder and longer neck improving barrel life? Like has someone shot a barrel out in a cartridge with a 35 degree shoulder, chambered another barrel with a 40 degree shoulder in basically the same cartridge and shot the barrel out? Same thing with neck length? Obviously changing the shoulder 5 degrees would change the capacity slightly. But at least it would be a real world test compared to speculation. </p><p></p><p>Benefits of the SS are possibly better barrel life. Which you lose some of that since you have to fire form. WSM will be less expensive and better velocity.</p></blockquote><p></p>
[QUOTE="dirtytough, post: 1575202, member: 6597"] I've had the exact same luck. My brother built a 6.5-06ai and was getting just over 3200 fps. I built one with a 1" longer barrel and could only get 3150 fps. Rich was getting 3070 fps with his 7ss with a 180 berger. I have to lean on my 7ss extremely hard to get 3000 fps with a 180 eld'm. About the barrel life. Its kind of hard to compare barrel life unless the same shooter burned up both barrels. Just cause you read a claim on the internet about getting xxxx rounds down a barrel doesn't mean that shooter shot the same as another shooter getting xxx with a comparable cartridge. If you download the 270wsm to the same velocities as the 270ss it would no doubt improve barrel life. Also is there any actual evidence of a sharper shoulder and longer neck improving barrel life? Like has someone shot a barrel out in a cartridge with a 35 degree shoulder, chambered another barrel with a 40 degree shoulder in basically the same cartridge and shot the barrel out? Same thing with neck length? Obviously changing the shoulder 5 degrees would change the capacity slightly. But at least it would be a real world test compared to speculation. Benefits of the SS are possibly better barrel life. Which you lose some of that since you have to fire form. WSM will be less expensive and better velocity. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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270. wsm vs 270 ss
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