A second conclusion is that another inch of barrel length, in .22 LR handguns, increases the velocity as much as switching from HV .22 LR ammo (advertised velocity of about 1200 fps) to Ultra-HV .22 LR ammo (advertised velocity of about 1400 fps).
The third set of data from the left, the one that is significantly above the trend line, is a Ruger revolver. Presumably that specimen had a very tight fit between the cylinder and barrel and very little gas escaped.
The first circled data is a Heritage .22 Mag revolver and it does not perform significantly better than .22 LR firearms. One suspects that the gap between the end of the cylinder and the barrel was excessive on that particular specimen.
If any of my readers have opinions about 4" vs. 6" barrels in the Ruger Mark XX/Browning Buckmark/S&W Victory handguns I would love to hear them. Also, any recommendations for holsters for "open carry" with secondary retention features for that class of handguns will be much appreciated.
|Graphic from BBTI website|
|Graphic from BBTI website.|
Ballistics will always vary greatly, even within guns of the same manufacture. And the gap between the forcing cone and barrel WILL cause loss of velocity.ReplyDelete