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Rifles, Reloading, Optics, Equipment
Reloading
Barrel length quwstion?
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 329273" data-attributes="member: 505"><p>Depends on several factors. Big overbore small caliber magnums can gain quite a bit with barrel length. Short efficient cartridges like the 6mm BR gain very little. For example my 257 and 264 STW's have gained as much as a 100 fps going from 26" to 28" of barrel length. My big 338's including the Lapua, 338-378 wby, 338 ulttramag and 338-300 ultramag average about 20 fps per inch. Powders and primers also affect barrel length velocity. Sometimes with a faster powder and hot primer to get all the burn quick as possible you can overcome some of the velocity loss in a shorter barrel. Lots of factors and there is no set velocity gain per inch of barrel. It will differ with each cartridge or class of cartridges.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 329273, member: 505"] Depends on several factors. Big overbore small caliber magnums can gain quite a bit with barrel length. Short efficient cartridges like the 6mm BR gain very little. For example my 257 and 264 STW's have gained as much as a 100 fps going from 26" to 28" of barrel length. My big 338's including the Lapua, 338-378 wby, 338 ulttramag and 338-300 ultramag average about 20 fps per inch. Powders and primers also affect barrel length velocity. Sometimes with a faster powder and hot primer to get all the burn quick as possible you can overcome some of the velocity loss in a shorter barrel. Lots of factors and there is no set velocity gain per inch of barrel. It will differ with each cartridge or class of cartridges. [/QUOTE]
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Barrel length quwstion?
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