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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Lawton M7500 BR receiver, Manner stock and Rock barrel tests started.
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<blockquote data-quote="TMR" data-source="post: 124465" data-attributes="member: 5819"><p>I did some initial velocity testing at the shop and found that the new Rock barrel design needed significantly more powder to match that of the Lilja barrel but also allowed more top end velocity potential. At 105.0 gr US869 I was averaging 3265 fps with really no pressure signs at all. In my Lilja barrels I was stopping at 102.0 gr with 3175 fps and similiar pressure sign on the case head reading the extractor marks which are extremely faint but just visable.</p><p></p><p></p><p>Kirby,</p><p>Is this comparing to the 1-8 3 groove Lilja or the 1-9 6 groove barrels ? I was hoping to be able to reach 3250 or so with the rifle you are building for me.</p></blockquote><p></p>
[QUOTE="TMR, post: 124465, member: 5819"] I did some initial velocity testing at the shop and found that the new Rock barrel design needed significantly more powder to match that of the Lilja barrel but also allowed more top end velocity potential. At 105.0 gr US869 I was averaging 3265 fps with really no pressure signs at all. In my Lilja barrels I was stopping at 102.0 gr with 3175 fps and similiar pressure sign on the case head reading the extractor marks which are extremely faint but just visable. Kirby, Is this comparing to the 1-8 3 groove Lilja or the 1-9 6 groove barrels ? I was hoping to be able to reach 3250 or so with the rifle you are building for me. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Lawton M7500 BR receiver, Manner stock and Rock barrel tests started.
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