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Long Range Hunting & Shooting
6.5 Creedmore or .308 Win. ?
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<blockquote data-quote="MudRunner2005" data-source="post: 1375317" data-attributes="member: 12995"><p>I am also a .300BLK shooter...And while they function [quite well] to their intended purpose, with the bigger and heavier bullets, you will see better performance with more powder behind it. For example, a .30-6.5 Grendel would perform better than a .300BLK in supersonic form. The .308 Win out-performs a .30-6.5 Grendel, the .30-06 will out-perform the .308 Win.....etc....etc...</p><p></p><p>With a small diameter neck like the 6.5mm, you will run out of performance sooner than you will with larger diameter bullet cartridges. You can only fit so much powder at a time through a given diameter bore. So if you compare equal cartridge sizes, the pressures are decreased the more you increase bullet diameter.</p><p></p><p>This is what we are talking about when we use the term "point of diminishing returns". It's when your performance bottlenecks and you are just burning more powder to get very minimal performance increases. That's why once you reach a certain cartridge capacity for a given neck diameter, you stop seeing huge gains, and start losing barrel life and might gain only 25-50 FPS of MV by shoveling in that extra 15-25 grains of powder over the next size down cartridge. A good example of this is the 7mm STW & .28 Nosler vs. the 7mm RUM.</p></blockquote><p></p>
[QUOTE="MudRunner2005, post: 1375317, member: 12995"] I am also a .300BLK shooter...And while they function [quite well] to their intended purpose, with the bigger and heavier bullets, you will see better performance with more powder behind it. For example, a .30-6.5 Grendel would perform better than a .300BLK in supersonic form. The .308 Win out-performs a .30-6.5 Grendel, the .30-06 will out-perform the .308 Win.....etc....etc... With a small diameter neck like the 6.5mm, you will run out of performance sooner than you will with larger diameter bullet cartridges. You can only fit so much powder at a time through a given diameter bore. So if you compare equal cartridge sizes, the pressures are decreased the more you increase bullet diameter. This is what we are talking about when we use the term "point of diminishing returns". It's when your performance bottlenecks and you are just burning more powder to get very minimal performance increases. That's why once you reach a certain cartridge capacity for a given neck diameter, you stop seeing huge gains, and start losing barrel life and might gain only 25-50 FPS of MV by shoveling in that extra 15-25 grains of powder over the next size down cartridge. A good example of this is the 7mm STW & .28 Nosler vs. the 7mm RUM. [/QUOTE]
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6.5 Creedmore or .308 Win. ?
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