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Long Range Hunting & Shooting
Proof research carbon or Barlein 5R Stainless ?
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<blockquote data-quote="Dragoon300" data-source="post: 2466206" data-attributes="member: 115285"><p>Exactly, Bartlien recommends no more than one inch gain, however they have been involved with people experimenting with quite a lot more transition with long heavy for caliber bullets. Many competitive shooter use slight gain twist barrels just for the sealing benefit. The first gain twist I saw was the 20 mm Vulcan that starts out straight and ends like a cork screw. They needed to get heavy projectiles rotating and up to speed without stripping the rotating bands off. I have two, a 338 LM 5R LH 1:10.35 to 1:9.35 and a 6.5 PRC 5R LH 1:8.5 to 1:7.5 both are 1/4 moa barrels and I feel they help reduce initial shot start pressure. They work for me!</p></blockquote><p></p>
[QUOTE="Dragoon300, post: 2466206, member: 115285"] Exactly, Bartlien recommends no more than one inch gain, however they have been involved with people experimenting with quite a lot more transition with long heavy for caliber bullets. Many competitive shooter use slight gain twist barrels just for the sealing benefit. The first gain twist I saw was the 20 mm Vulcan that starts out straight and ends like a cork screw. They needed to get heavy projectiles rotating and up to speed without stripping the rotating bands off. I have two, a 338 LM 5R LH 1:10.35 to 1:9.35 and a 6.5 PRC 5R LH 1:8.5 to 1:7.5 both are 1/4 moa barrels and I feel they help reduce initial shot start pressure. They work for me! [/QUOTE]
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Proof research carbon or Barlein 5R Stainless ?
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