手枪打重弹头会偏高

SemperFortis

这里有篇chuck hawks的文章，最后一段：

It should go without saying, but we will say it anyway: another crucial factor is the firmness of the shooter's grip. A firm grip with more muscle tension reduces muzzle flip and therefore the point of bullet impact. A light grip with less muscle tension allows the pistol to kick higher, throwing the bullet higher. Holding a handgun exactly the same way with the same amount of pressure from shot to shot is absolutely critical to maintaining a consistent point of impact with any load. This should be obvious, but there is a natural tendency to "clamp down" on a pistol when shooting heavy loads. For example, a shooter with a .38 Special/.357 Magnum revolver may unconsciously grip the revolver tighter when shooting full power .357 Magnum loads than when shooting light .38 Special practice loads. Any attempt to change the point of bullet impact by changing loads requires using exactly the same grip on the gun with all loads.

ca1903

看了兩位的討論。

其實我們可以看到Hatcher的測試結果，同樣彈頭，不同的火藥量，這個趨勢可以是相反的。但是火藥量造成的POI變化，小於彈頭重量造成的變化。

看來火藥量是個2nd order effect，我還沒有仔細想想怎麼分析。2nd order effect當然難多了！

dwell time是個因素，後座大小也是個因素。應是後座力對時間的積分才是總和的影響。