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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.20 Cal Berger 55gr, any one using?
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<blockquote data-quote="65WSM" data-source="post: 1296936" data-attributes="member: 9551"><p>Please note that Berger (Mr Litz) has redone the calculations and suggests a 7 twist barrel for this bullet. The only 7 I could find was Pac-Nor. I don't actually know if and what their timetable for delivery would be. I used an 8 twist McGowen 28 inch barrel. I had the barrel "nitrocarburized" so it will last a few rounds. </p><p></p><p>So far my .20 BR is very fast. The Magnetospeed shows with CCI 450 and R-17:</p><p></p><p></p><p> 31.0 gr 3604 31.0 gr 3578 31.1 gr 3617 31.1 gr 3570 31.2 gr 3617 31.3 gr 3646 31.4 gr 3632 29.7 gr 3572 31.0 gr 3543</p></blockquote><p></p>
[QUOTE="65WSM, post: 1296936, member: 9551"] Please note that Berger (Mr Litz) has redone the calculations and suggests a 7 twist barrel for this bullet. The only 7 I could find was Pac-Nor. I don't actually know if and what their timetable for delivery would be. I used an 8 twist McGowen 28 inch barrel. I had the barrel "nitrocarburized" so it will last a few rounds. So far my .20 BR is very fast. The Magnetospeed shows with CCI 450 and R-17: 31.0 gr 3604 31.0 gr 3578 31.1 gr 3617 31.1 gr 3570 31.2 gr 3617 31.3 gr 3646 31.4 gr 3632 29.7 gr 3572 31.0 gr 3543 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.20 Cal Berger 55gr, any one using?
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