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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What’s up with 30-378?
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<blockquote data-quote="MagnumManiac" data-source="post: 2334559" data-attributes="member: 10755"><p>Pressure does appear to rise quicker with this cartridge than velocity.</p><p>I played with one many years ago.</p><p>I think you need to use powders like H50BMG, US869 and Vhit 24N41/20N29 to get the most out of the cartridge.</p><p>I dabbled with RE33 back then but there was no data and it proved difficult to not get some pressure excursions and I left it alone in the end.</p><p>I think Kirby Allen has some recent data on similar sized cases, but the throat length may be quite different.</p><p>I have my own wildcat 338-416 Rigby Improved I always wanted to neck down to 30 cal, but always thought that the pressure would rise faster than velocity does.</p><p>The problem is the expansion ratio, the bore size is just too small for the case capacity.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2334559, member: 10755"] Pressure does appear to rise quicker with this cartridge than velocity. I played with one many years ago. I think you need to use powders like H50BMG, US869 and Vhit 24N41/20N29 to get the most out of the cartridge. I dabbled with RE33 back then but there was no data and it proved difficult to not get some pressure excursions and I left it alone in the end. I think Kirby Allen has some recent data on similar sized cases, but the throat length may be quite different. I have my own wildcat 338-416 Rigby Improved I always wanted to neck down to 30 cal, but always thought that the pressure would rise faster than velocity does. The problem is the expansion ratio, the bore size is just too small for the case capacity. Cheers. [/QUOTE]
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What’s up with 30-378?
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