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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel lengths per cartridge decisions
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<blockquote data-quote="MagnumManiac" data-source="post: 3059372" data-attributes="member: 10755"><p>You are correct, however, my understanding of this is a perfect example of bore ratio. The only time I personally saw this was with the 338-416 Rigby Improved 45° using RE25 in loads above 118g with a light 285g bullet. Pressure reached max and then at bullet release there was a jump up to 100,000psi. I recall the muzzle flash was extremely large also. I used to have that graph, but haven't used that laptop since closing the gunsmithing business and my divorce.</p><p>Very interesting results.</p><p>I think that muzzle pressure is a direct relationship to bore ratio and you can't get around it unless you increase barrel length to match.</p><p>Still haven't tested the 300RUM, but believe this is a very good candidate for muzzle pressure issues.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 3059372, member: 10755"] You are correct, however, my understanding of this is a perfect example of bore ratio. The only time I personally saw this was with the 338-416 Rigby Improved 45° using RE25 in loads above 118g with a light 285g bullet. Pressure reached max and then at bullet release there was a jump up to 100,000psi. I recall the muzzle flash was extremely large also. I used to have that graph, but haven’t used that laptop since closing the gunsmithing business and my divorce. Very interesting results. I think that muzzle pressure is a direct relationship to bore ratio and you can’t get around it unless you increase barrel length to match. Still haven’t tested the 300RUM, but believe this is a very good candidate for muzzle pressure issues. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel lengths per cartridge decisions
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