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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Thinking of going 6.5 PRC thoughts
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<blockquote data-quote="Michael O&#039;Connor" data-source="post: 1758073" data-attributes="member: 103722"><p>I studied the 375 Ruger case since they developed it. The 300 & 338 RCM next. Then the 7mm LRM. The 6.5 PRC and next the 300 PRC. I see a jumble of broad stroke ideas but nothing ideal with engineering design. The only long neck case was the 7 LRM and maybe that was too long at .382". That is a neck to bore ratio of 1.345. Who finds these engineers of design ? The only thing that came from good design of this case was the 30° shoulder. Any neck longer than .341 is certainly out of the sweet spot ratio of 1.1 to 1.2 neck to bore ratio. Anything longer than that doesn't consider other factors, such as standard magazine lengths and such. You certainly don't want to go past the ogive in clamping from the case in a hybrid bullet. So, you take the second longest high B.C. bullet from there and design the case. You have to basically take two commonalities in COAL for magazines of 2.86" for short actions and 3.34" for standard long actions. We won't observe the magnum long action magazine lengths as there are several different custom lengths, sometimes depending on manufacturer. More often than not these lengths are standardized by one manufacturer by a certain cartridge case and bullet. New high B.C. bullets are developed quite often and so this is not part of the scope of our study in long action magnum magazine lengths as the military drives that development more than the other markets of users.</p></blockquote><p></p>
[QUOTE="Michael O'Connor, post: 1758073, member: 103722"] I studied the 375 Ruger case since they developed it. The 300 & 338 RCM next. Then the 7mm LRM. The 6.5 PRC and next the 300 PRC. I see a jumble of broad stroke ideas but nothing ideal with engineering design. The only long neck case was the 7 LRM and maybe that was too long at .382". That is a neck to bore ratio of 1.345. Who finds these engineers of design ? The only thing that came from good design of this case was the 30° shoulder. Any neck longer than .341 is certainly out of the sweet spot ratio of 1.1 to 1.2 neck to bore ratio. Anything longer than that doesn't consider other factors, such as standard magazine lengths and such. You certainly don't want to go past the ogive in clamping from the case in a hybrid bullet. So, you take the second longest high B.C. bullet from there and design the case. You have to basically take two commonalities in COAL for magazines of 2.86" for short actions and 3.34" for standard long actions. We won't observe the magnum long action magazine lengths as there are several different custom lengths, sometimes depending on manufacturer. More often than not these lengths are standardized by one manufacturer by a certain cartridge case and bullet. New high B.C. bullets are developed quite often and so this is not part of the scope of our study in long action magnum magazine lengths as the military drives that development more than the other markets of users. [/QUOTE]
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Thinking of going 6.5 PRC thoughts
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