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Hunting
The Basics, Starting Out
Barrel burnout
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<blockquote data-quote="Greyfox" data-source="post: 2543752" data-attributes="member: 10291"><p>The bore capacity/weight in the chart is the charge weight of the length of the cartridge were equal to the diameter. The author intended it to show this value(charge weight) to serve as a reference (or index) point between the calibers when a "square" charge is loaded. The degree of "over-bore" is dictated by how much you exceed this ((square) charge weight. "Over-bore" cartridges generally produce less barrel life. For example a 6.5 calibers bore capacity charge weight is 33gr. With an estimated 3000 round barrel life. At 60grs the barrel life drops off to 1000 rounds. This cartridge/ load would be considered over-bore….more so then a 6.5CM with a 39gr charge. Most all modern cartridges have charges that are greater then the square charge…it's only used as an index to compare the degree of over-bore. I believe authors overall intent of the chart was to show relative comparisons with caliber. Absolute barrel life is effected by several variables, but the values shown in the chart tie pretty close to my own experiences given "average" use…not babied/not cooked.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 2543752, member: 10291"] The bore capacity/weight in the chart is the charge weight of the length of the cartridge were equal to the diameter. The author intended it to show this value(charge weight) to serve as a reference (or index) point between the calibers when a “square” charge is loaded. The degree of “over-bore” is dictated by how much you exceed this ((square) charge weight. “Over-bore” cartridges generally produce less barrel life. For example a 6.5 calibers bore capacity charge weight is 33gr. With an estimated 3000 round barrel life. At 60grs the barrel life drops off to 1000 rounds. This cartridge/ load would be considered over-bore….more so then a 6.5CM with a 39gr charge. Most all modern cartridges have charges that are greater then the square charge…it’s only used as an index to compare the degree of over-bore. I believe authors overall intent of the chart was to show relative comparisons with caliber. Absolute barrel life is effected by several variables, but the values shown in the chart tie pretty close to my own experiences given “average” use…not babied/not cooked. [/QUOTE]
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The Basics, Starting Out
Barrel burnout
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