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iamwhoami 发表于 2016-12-22 23:57 
起啥作用呢？
就是能增加子弹稳定性减少自身弹着点偏差的一个东西，打小口径三姿和卧射的射手很多人都装了这个
2.The tube has a tuner in order to tune the rifle for "positive compensation" in order to avoid vertical groups.
3.The clamp on the barrel is very short(25mm),in order to have the chock the tube has on the barrel,right at the muzzle. It improves accuracy.
细节可以看这还有仿真图，跟后坐力产生的的频率和波形什么的有关
A secondary advantage is the protection such a device offers to the crown of the barrel, any damage to which is detrimental to the barrel’s accuracy.
The tuner is a weight which can be precisely position by minute steps, allowing you to find the “Sweet Spot” of the tuner, by precisely adjusting the position of the tuning weight, until the barrel oscillations, create “positive compensation” thus greatly improving the accuracy with ammo of higher or lower velocity. This avoids vertical groups on the target.
Being able to “tune the barrel” is an art long since studied by long distance bench rest shooters, but largely ignored by many Olympic Rimfire competitors. This is a shame, as the tuning can make a real and meaningful improvement to your rifle’s accuracy!
As a bullet speeds through the barrel it creates a whipping effect in the barrel, much like a Sinus wave form. This is minute of course, but it does mean that a faster and a lower bullet will launch from the crown of the barrel at a slightly different angle within that sinus wave form. This leads to a vertical displacement on the target. Bearing in mind that even with good ammo, the variance in speed can be as much as 30 fps – this is a big deal! Usually, the faster bullet will hit higher on the target, and a variance of 30 fps will translate to about 5mm height difference on a 50m target. Too much! Way too much.
总之简单说，轻微减少子弹不可控的偏移，轻微 |
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回国美食集锦陆续更新ing——147楼开始新一轮更新，149楼新添羊肉泡馍 (2010-11-22) crossrainbow 
楼主:iamwhoami
发表于 2016-12-18 09:01
