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Posted: 3/1/2011 2:30:33 PM EDT
| when i look on wikipieda(yes i know its not the most realiable sight) it says that the bullet diameter is 7.82 so why isnt it called the 7.82x51 instead? Thanks in advance for the input |
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Bore and groove diameter are different. Some cartridges are named for nominal bore diameter. Off the top of my head I can't think of a cartridge that is named for the groove diameter.
7.62mm = .3 inches = bore diameter 7.82mm = .3079 inches = groove diameter B EDIT: Doh! how bout .308 
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Quoted:
Lets screw this up even more. 7.5 Swiss can be reloaded with 7.62\.308 bullets because they're the same size. The Swiss measure their bores differently than we do.Very true! M1917 rifles with original barrels tend to shoot better with .311 bullets than with the "proper" .308 diameter bullets. Reason: Like the Swiss, when we made those barrels we used the British method of measuring lands/grooves. Easiest way to get around it with .308 bullets... Use heavier rounds that have a longer bearing surface. |
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