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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why do some barrels create higher velocity than others
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<blockquote data-quote="J E Custom" data-source="post: 1519578" data-attributes="member: 2736"><p>Barrel makers normally make there barrels bores to industry standards so they can be chambered using a standard reamer pilot and also depending on the bullet diameter and displacement of the bullet when a bullet is engraved by the lands. It must fill the bore completely, and seal off the gas from the powder to prevent blow by.</p><p></p><p>If the barrel bore is to big for the bullet by only by a few ten thousandths, there will be blow by and velocity and barrel life will suffer. If it is to small, the bullet will be extruded and loose diameter, gain length, and the pressure will go up for the same load. The amount of these changes can get one into trouble, so the barrel makers don,t have much room to Play with.</p><p></p><p>I suspect your chamber or loads are the difference, because I have chambered many different barrel brands and only found one barrel brand that often required a smaller bushing to fit. Brux was not the one. All others used the standard reamer pilot most of the time and some require a larger bushing (.00001) to fit properly.</p><p></p><p>Just my experience with different barrel brands.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1519578, member: 2736"] Barrel makers normally make there barrels bores to industry standards so they can be chambered using a standard reamer pilot and also depending on the bullet diameter and displacement of the bullet when a bullet is engraved by the lands. It must fill the bore completely, and seal off the gas from the powder to prevent blow by. If the barrel bore is to big for the bullet by only by a few ten thousandths, there will be blow by and velocity and barrel life will suffer. If it is to small, the bullet will be extruded and loose diameter, gain length, and the pressure will go up for the same load. The amount of these changes can get one into trouble, so the barrel makers don,t have much room to Play with. I suspect your chamber or loads are the difference, because I have chambered many different barrel brands and only found one barrel brand that often required a smaller bushing to fit. Brux was not the one. All others used the standard reamer pilot most of the time and some require a larger bushing (.00001) to fit properly. Just my experience with different barrel brands. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why do some barrels create higher velocity than others
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