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Rifles, Reloading, Optics, Equipment
7mm STW
7mm STW vs 7mm WBY
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<blockquote data-quote="Lefty7mmstw" data-source="post: 992467" data-attributes="member: 48043"><p>hogwash, and I shot 1,000 rounds worth of rl25 in my last stw with both nosler and sierra 140's.</p><p> At 81 gr rl25 with a 140 sierra you are at 3350 fps at 58,500-59,500 psi in my old rifle (26" bbl. sendero)... (roughly- no reference ammo but 70,000 psi win factory ammo had a bit of a shiner so it was over-pressure in my rifle)</p><p> </p><p>you will gain pressure quickly even in a 12" twist with little real vel. gains.. I do not have any graphs of heavier than 81 grains though as those have been lost to the sands of time, but hovering at 60,000 psi with a medium load does not get you 4700 fps with a full out load in a couple of inch longer barrel, especially when the stw is only in the 10,000 to 20,000 psi mark at the muzzle at 26".</p><p> </p><p><a href="http://www.longrangehunting.com/forums/f28/4000-fps-7mm-stw-w-140-bullet-109862/index7.html" target="_blank">http://www.longrangehunting.com/forums/f28/4000-fps-7mm-stw-w-140-bullet-109862/index7.html</a></p><p> </p><p>this page has some of the traces from my old rifle... for your enjoyment <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 992467, member: 48043"] hogwash, and I shot 1,000 rounds worth of rl25 in my last stw with both nosler and sierra 140's. At 81 gr rl25 with a 140 sierra you are at 3350 fps at 58,500-59,500 psi in my old rifle (26" bbl. sendero)... (roughly- no reference ammo but 70,000 psi win factory ammo had a bit of a shiner so it was over-pressure in my rifle) you will gain pressure quickly even in a 12" twist with little real vel. gains.. I do not have any graphs of heavier than 81 grains though as those have been lost to the sands of time, but hovering at 60,000 psi with a medium load does not get you 4700 fps with a full out load in a couple of inch longer barrel, especially when the stw is only in the 10,000 to 20,000 psi mark at the muzzle at 26". [URL]http://www.longrangehunting.com/forums/f28/4000-fps-7mm-stw-w-140-bullet-109862/index7.html[/URL] this page has some of the traces from my old rifle... for your enjoyment :-) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
7mm STW vs 7mm WBY
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