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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
If you could design a cartridge from scratch
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<blockquote data-quote="MagnumManiac" data-source="post: 2841133" data-attributes="member: 10755"><p>I designed 2 wildcats based off of the 416 Rigby case, blown out with .005" per inch taper, 338 and 375 cals with 45° and 40° shoulders respectively. Necks are .050" longer than calibre and the idea was to gain maximum velocity without excessive pressure and to keep the flame front as close to the shoulder as possible. This has worked, as throat growth was way less than what I predicted in both cals.</p><p>Funny thing is, the Norma, Lapua and others came out after my design and the David Tubb line of XC cartridges are very similar.</p><p>Had drawn up a reamer for a 30 cal variant but it never came to fruition due to circumstances changing.</p><p>Running 9" twists in both 33 and 37 cal gave me more flexibility, as I was also designing CNC turned brass solids with VLD features. They end up very long and require HBN coating to keep pressure down and velocity up.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2841133, member: 10755"] I designed 2 wildcats based off of the 416 Rigby case, blown out with .005” per inch taper, 338 and 375 cals with 45° and 40° shoulders respectively. Necks are .050” longer than calibre and the idea was to gain maximum velocity without excessive pressure and to keep the flame front as close to the shoulder as possible. This has worked, as throat growth was way less than what I predicted in both cals. Funny thing is, the Norma, Lapua and others came out after my design and the David Tubb line of XC cartridges are very similar. Had drawn up a reamer for a 30 cal variant but it never came to fruition due to circumstances changing. Running 9” twists in both 33 and 37 cal gave me more flexibility, as I was also designing CNC turned brass solids with VLD features. They end up very long and require HBN coating to keep pressure down and velocity up. Cheers. [/QUOTE]
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If you could design a cartridge from scratch
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