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Rifles, Reloading, Optics, Equipment
7mm STW
Thinking of building a 7 stw
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<blockquote data-quote="MudRunner2005" data-source="post: 1096755" data-attributes="member: 12995"><p>The 7RUM uses about 18-20gr more powder for about a 50-75 (maybe 100) fps gain on the STW, and the excess powder burns the throat more per shot, which in-turn cuts the accurate throat life by nearly half. The point of diminishing returns far outweighs the need for such a slight advantage...Whereas when comparing the average estimated accurate barrel and throat life of the STW to the RM they are much closer. Basically, once you reach a certain point of powder capacity for bullet diameter ratio, the negaitives far outweigh the positives. Best example I know first-hand is comparing the .25-06 AI vs. .257 Wby. The Weatherby uses 14+ more grains of powder for the same velocities as the ..25-06 AI because the case design is nowhere near as efficient using the same diameter and weight bullets.</p><p></p><p>IMO, the only way I could see a RUM noticeably out-performing the STW is if the new Berger 195's ever enter the equation. However, that also has ALOT of factors playing into it that would be borderline worth the excess wear & tear...But have yet to be seen. At this point it's strictly speculation, as nobody actually knows, other than the testers for Berger, but they aren't at liberty to discuss this yet, since the bullets have not been publically introduced to the open market.</p></blockquote><p></p>
[QUOTE="MudRunner2005, post: 1096755, member: 12995"] The 7RUM uses about 18-20gr more powder for about a 50-75 (maybe 100) fps gain on the STW, and the excess powder burns the throat more per shot, which in-turn cuts the accurate throat life by nearly half. The point of diminishing returns far outweighs the need for such a slight advantage...Whereas when comparing the average estimated accurate barrel and throat life of the STW to the RM they are much closer. Basically, once you reach a certain point of powder capacity for bullet diameter ratio, the negaitives far outweigh the positives. Best example I know first-hand is comparing the .25-06 AI vs. .257 Wby. The Weatherby uses 14+ more grains of powder for the same velocities as the ..25-06 AI because the case design is nowhere near as efficient using the same diameter and weight bullets. IMO, the only way I could see a RUM noticeably out-performing the STW is if the new Berger 195's ever enter the equation. However, that also has ALOT of factors playing into it that would be borderline worth the excess wear & tear...But have yet to be seen. At this point it's strictly speculation, as nobody actually knows, other than the testers for Berger, but they aren't at liberty to discuss this yet, since the bullets have not been publically introduced to the open market. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Thinking of building a 7 stw
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