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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Polygonal rifled barrels and monometal bullets????
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<blockquote data-quote="Dave King" data-source="post: 30547" data-attributes="member: 3"><p>VH</p><p></p><p> There are a couple of types of polygonal rifling as I understand it, most notably "male" and "female". My polygonal rifled barrels look very similar to standard barrels with the exception that there are no sharp edges in the rifling... it looks like worn out standard rifling. The barrels are tighter to afford the better seal and a more compressible bullet would be a good idea. Thinks of a polar bear pulling a seal out of the water through a 4" breathing hole vice a 6" breathing hole... It kills the seal but the 4" "bottle cork" seal gets a little longer and skinnier, bear need to pull a little harder... The larger the projectile I fired through the polygonal barrel the more to the left the group would print, sometimes as much a 6 inches left at 100 yards. This group shifting was repeatable but the reuse of the brass was not as I often blew primer pockets... Polygonal barrels are tight, monometal bullets don't appreciate being reshaped any more than that 4" wide 6' long seal....</p></blockquote><p></p>
[QUOTE="Dave King, post: 30547, member: 3"] VH There are a couple of types of polygonal rifling as I understand it, most notably "male" and "female". My polygonal rifled barrels look very similar to standard barrels with the exception that there are no sharp edges in the rifling... it looks like worn out standard rifling. The barrels are tighter to afford the better seal and a more compressible bullet would be a good idea. Thinks of a polar bear pulling a seal out of the water through a 4" breathing hole vice a 6" breathing hole... It kills the seal but the 4" "bottle cork" seal gets a little longer and skinnier, bear need to pull a little harder... The larger the projectile I fired through the polygonal barrel the more to the left the group would print, sometimes as much a 6 inches left at 100 yards. This group shifting was repeatable but the reuse of the brass was not as I often blew primer pockets... Polygonal barrels are tight, monometal bullets don't appreciate being reshaped any more than that 4" wide 6' long seal.... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Polygonal rifled barrels and monometal bullets????
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