Middletown
Member
I am putting this in general Handgun because I am mostly asking about testing of viability and effectiveness for defensive uses with handguns. Both, semi and revolver handguns and maybe concealable or nightstand gun.
Everything I have read only addressed bullet stability and accuracy during flight and accuracy was the objective. “ABC’s of Reloading” devoted a section on the history in the 1800’s and the formulas developed that I think are at least somewhat in use today. ABC’s also divided ballistics into internal, external and terminal for its definitions.
As a re-loader using quality components and good firearms, making ammo more accurate than I am is something I can do. I have always been very interested in internal ballistics. Matching powder, bullet and firearm for desired velocity has always given the terminal ballistics I want for hunting and practice/target shooting.
Has there been any known research of increased or extreme twist rates and terminal ballistics? Any of this research results available?
I searched a couple times and never found what I was looking for.
To keep the math easy a bullet fired from a 1:16 twist rate and barrel exit velocity of 1000 fps the bullet is turning 45,000 rpm’s when it leaves the barrel. That sounds like a lot and maybe it is. More than once I have fired both handguns and rifles concentrating of if the torque was something I could notice and it wasn’t. The torque has to be there but mass of firearm, recoil and other things must overcome the perception.
Everything I have read only addressed bullet stability and accuracy during flight and accuracy was the objective. “ABC’s of Reloading” devoted a section on the history in the 1800’s and the formulas developed that I think are at least somewhat in use today. ABC’s also divided ballistics into internal, external and terminal for its definitions.
As a re-loader using quality components and good firearms, making ammo more accurate than I am is something I can do. I have always been very interested in internal ballistics. Matching powder, bullet and firearm for desired velocity has always given the terminal ballistics I want for hunting and practice/target shooting.
Has there been any known research of increased or extreme twist rates and terminal ballistics? Any of this research results available?
I searched a couple times and never found what I was looking for.
To keep the math easy a bullet fired from a 1:16 twist rate and barrel exit velocity of 1000 fps the bullet is turning 45,000 rpm’s when it leaves the barrel. That sounds like a lot and maybe it is. More than once I have fired both handguns and rifles concentrating of if the torque was something I could notice and it wasn’t. The torque has to be there but mass of firearm, recoil and other things must overcome the perception.