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Rifles, Reloading, Optics, Equipment
7mm STW
Long range hunting 7STW build question.
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<blockquote data-quote="J E Custom" data-source="post: 1764140" data-attributes="member: 2736"><p>I would recommend re barreling it with a quality barrel, and at the same time blueprint the action based on the work you already have done and the rounds fired.</p><p></p><p>Depending on the weight class of bullets you intend to use I would pick a twist rate that would cover a bullet with a 20 grain spread both sides of that weight (140 to 160 if 150 was the wanted weight) this will allow for a wide range of bullet weights and stiles.</p><p></p><p> Be careful of the very fast twist on a 7 STW because they will push a Bullet to its limit quickly. I built a 31" barreled STW that could exceed 3800 ft/sec with a 140 and it was very hard on bullets over 3700 ft/sec so I had to go up to a 160 for the 1 in 9 twist to work. Smaller 7mm cartridges will work with fast twist if shooting heavy bullets (160+)</p><p>because of the obtainable velocity, but the 7 STW and the RUM don't have any problem</p><p>exceeding many bullets maximum velocities. For the STW I would recomend a 1 in 8 for the heaviest bullets and a 1 in 9 for medium weights.</p><p></p><p>Just My experances with the STW and the RUM in 7 mm.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1764140, member: 2736"] I would recommend re barreling it with a quality barrel, and at the same time blueprint the action based on the work you already have done and the rounds fired. Depending on the weight class of bullets you intend to use I would pick a twist rate that would cover a bullet with a 20 grain spread both sides of that weight (140 to 160 if 150 was the wanted weight) this will allow for a wide range of bullet weights and stiles. Be careful of the very fast twist on a 7 STW because they will push a Bullet to its limit quickly. I built a 31" barreled STW that could exceed 3800 ft/sec with a 140 and it was very hard on bullets over 3700 ft/sec so I had to go up to a 160 for the 1 in 9 twist to work. Smaller 7mm cartridges will work with fast twist if shooting heavy bullets (160+) because of the obtainable velocity, but the 7 STW and the RUM don't have any problem exceeding many bullets maximum velocities. For the STW I would recomend a 1 in 8 for the heaviest bullets and a 1 in 9 for medium weights. Just My experances with the STW and the RUM in 7 mm. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Long range hunting 7STW build question.
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