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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I need help with barrel understanding
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<blockquote data-quote="chris matthews" data-source="post: 34504" data-attributes="member: 66"><p>The 5R does these things: (from Rock or Obemeyer)</p><p>1.More velocity- they are tight bored.</p><p>2. Deform the bullet less due to land opposing the groove and the leading edge of the land has an angle to it. Instead of a square 90 degree. I believe it is 80ish. Some people think the R means radius but it in fact means Russian. It was developed in this country by Boots Obermeyer. Rock learned from Boots and goot his blessing to do the 5R, the Broughton 5C is a little different as is the 5P from Schneider.</p><p>3. They break in extemely quick 3-10 shots.</p><p>4. They do last longer being cut rifled. The grooves are deeper than a button barrel.</p><p>Mike Rock has a M24 barrel from the Army (He held the contract for the M24 sniper rifle) that has over 65,000 (no that is not a typo) rounds on it- it has 4" of rifling at the muzzle. It just broke the 1 MOA standard of the Army. How's that for barrel life.</p><p>5. They clean extremely easy due to the sloped land- no corners to scrub crap out of.</p><p></p><p>Hope this helps...I spent a week at Rocks shop making barrels and built over 300 rifles on a 5R barrel.</p></blockquote><p></p>
[QUOTE="chris matthews, post: 34504, member: 66"] The 5R does these things: (from Rock or Obemeyer) 1.More velocity- they are tight bored. 2. Deform the bullet less due to land opposing the groove and the leading edge of the land has an angle to it. Instead of a square 90 degree. I believe it is 80ish. Some people think the R means radius but it in fact means Russian. It was developed in this country by Boots Obermeyer. Rock learned from Boots and goot his blessing to do the 5R, the Broughton 5C is a little different as is the 5P from Schneider. 3. They break in extemely quick 3-10 shots. 4. They do last longer being cut rifled. The grooves are deeper than a button barrel. Mike Rock has a M24 barrel from the Army (He held the contract for the M24 sniper rifle) that has over 65,000 (no that is not a typo) rounds on it- it has 4" of rifling at the muzzle. It just broke the 1 MOA standard of the Army. How's that for barrel life. 5. They clean extremely easy due to the sloped land- no corners to scrub crap out of. Hope this helps...I spent a week at Rocks shop making barrels and built over 300 rifles on a 5R barrel. [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
I need help with barrel understanding
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