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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Slo-mo barrel harmonics video
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<blockquote data-quote="J E Custom" data-source="post: 1228376" data-attributes="member: 2736"><p>All good questions</p><p></p><p>Q1=Yes. A shorter heavier barrel is normally used in bench rest shooting where velocity is not that important and accuracy means everything.</p><p></p><p>Q2= harmonics are a bad thing and we take great steps to minimize the effects of them buy bedding and using the heaviest/shortest barrel that is practical.</p><p></p><p>Q3= A truck sized barrel/chunk is not practical and there would still be harmonics but they would be reduced by the mass and have little if any effect on the accuracy. long, thin barrels are very susceptible to harmonics hence the reason that most factory rifles with these barrels have tip pressure applied by the stock. This can be very effective for one shot consistency by effectively</p><p>shortening the free barrel length. The problem with dealing with it this way is they only want one or two loads and any heating of the barrel changes the POI.</p><p></p><p>Q4=Free floating a barrel can do several things. It can improve the consistency of the barrel harmonics by eliminating any outside influences allowing the barrel to do the same thing every time improving the consistency shot to shot. The down side is that sometimes it allows the barrel to move to freely hurting accuracy/consistency. Some bed a small portion of the barrel shank in an effort to effectively shorten the barrel length and reduce the harmonics. this helps sometimes and may hurt other times.</p><p></p><p>When we tune the harmonics, what we are doing is trying to control them where the bullet leaves the barrel muzzle at the exact same position every time. There are lots of other steps to control/minimize harmonics. and in order to have a weapon that is manageable in the field we have to manage harmonics. It is important to understand harmonics and how to deal with them if accuracy is important.</p><p></p><p>I have said this many times and even been quoted by some. "The only advantage a light rifle has over a heavy rifle Is weight, all other advantages go to the heavier rifle". </p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1228376, member: 2736"] All good questions Q1=Yes. A shorter heavier barrel is normally used in bench rest shooting where velocity is not that important and accuracy means everything. Q2= harmonics are a bad thing and we take great steps to minimize the effects of them buy bedding and using the heaviest/shortest barrel that is practical. Q3= A truck sized barrel/chunk is not practical and there would still be harmonics but they would be reduced by the mass and have little if any effect on the accuracy. long, thin barrels are very susceptible to harmonics hence the reason that most factory rifles with these barrels have tip pressure applied by the stock. This can be very effective for one shot consistency by effectively shortening the free barrel length. The problem with dealing with it this way is they only want one or two loads and any heating of the barrel changes the POI. Q4=Free floating a barrel can do several things. It can improve the consistency of the barrel harmonics by eliminating any outside influences allowing the barrel to do the same thing every time improving the consistency shot to shot. The down side is that sometimes it allows the barrel to move to freely hurting accuracy/consistency. Some bed a small portion of the barrel shank in an effort to effectively shorten the barrel length and reduce the harmonics. this helps sometimes and may hurt other times. When we tune the harmonics, what we are doing is trying to control them where the bullet leaves the barrel muzzle at the exact same position every time. There are lots of other steps to control/minimize harmonics. and in order to have a weapon that is manageable in the field we have to manage harmonics. It is important to understand harmonics and how to deal with them if accuracy is important. I have said this many times and even been quoted by some. "The only advantage a light rifle has over a heavy rifle Is weight, all other advantages go to the heavier rifle". J E CUSTOM [/QUOTE]
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Slo-mo barrel harmonics video
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