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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Case capacity gained with improved cartridges
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<blockquote data-quote="subsonic" data-source="post: 30443" data-attributes="member: 1482"><p>Hi Len,</p><p>I wanted to build a little baby cartridge that I could carry lots of ammo when hunting Wallabies on steep hills and a light rifle to carry as well. I started with a std hornet and new the K was an option the case taper went from 20 thou to 15 thou and the shoulder angle was significantly steepened this increased case capacity from 14gn's water to 15.2gn's (+8.6%).</p><p>I then reduced case taper to 5 thou and shifted the shoulder forward slightly and my case capacity went up further to 16.5gn's (8.6% over K or even better 17.9% over the hornet). I ran this through quickload and it gave me 3300fps with the 40gn V-max versus a factory load 45gn hornet at 2600fps.</p><p>When I chronographed the Ruger 77/22hornet that had been specifically throated to suit the V-max (I had to lengthen the mag slightly internally to allow the V-maxs to touch the lands) the velocity was within 3fps of what quickload had predicted.</p><p>I now have a little rifle that behaves like a 223 (if I ignore bullet weight) with a 50gn bullet as far as trajectory goes but I can carry a lot more ammo easily.</p></blockquote><p></p>
[QUOTE="subsonic, post: 30443, member: 1482"] Hi Len, I wanted to build a little baby cartridge that I could carry lots of ammo when hunting Wallabies on steep hills and a light rifle to carry as well. I started with a std hornet and new the K was an option the case taper went from 20 thou to 15 thou and the shoulder angle was significantly steepened this increased case capacity from 14gn's water to 15.2gn's (+8.6%). I then reduced case taper to 5 thou and shifted the shoulder forward slightly and my case capacity went up further to 16.5gn's (8.6% over K or even better 17.9% over the hornet). I ran this through quickload and it gave me 3300fps with the 40gn V-max versus a factory load 45gn hornet at 2600fps. When I chronographed the Ruger 77/22hornet that had been specifically throated to suit the V-max (I had to lengthen the mag slightly internally to allow the V-maxs to touch the lands) the velocity was within 3fps of what quickload had predicted. I now have a little rifle that behaves like a 223 (if I ignore bullet weight) with a 50gn bullet as far as trajectory goes but I can carry a lot more ammo easily. [/QUOTE]
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Case capacity gained with improved cartridges
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