Guys could you point me in the direction of the documentation for over spinning bullets. I have always used a faster twist(several calibers) than rec. with great success. I have never been much for reading someone elses theories/experiences when I can develop my own at the range. I think I might have to have a look though to prevent any future mistakes.
__________________ "Amazing things can happen when preparation meet opportunity" Richard Schatz
"The will to win, compares little with the will to prepare to win" Donovan Moran
Do you like math?? I believe this is known as the "greenhill" formula (I hope it formats correctly when I save the post - it may not):
Define the Variables: T = Twist rate in 1 turn per inches. L = Bullet length in inches. V = Muzzle Velocity D = Diameter of the bore grooves in inches. Constant = 3.5 Find the optimum twist rate from velocity, bore size and bullet length: T= ( 3.5 * SqRt( V ) * D² ) ÷ L Find the optimum bullet length from velocity, bore size and twist rate: L = ( 3.5 * SqRt( V ) * D² ) ÷ T Find the optimum muzzle velocity from bullet length, bore size and twist rate: V = ( L * T ÷ D² ÷ 3.5 )² Find a different constant to fit known optimim combinations. Constant = L * T ÷ D² ÷ SqRt( V )
Oh I forgot, there is also the "miller" formula. But no sense in getting out of hand with the math. But if you DO happen to be one of those individuals who actually enjoys doing math, I could feed you many more numbers, if you want. In THIS post however, I'm going to limit it to only 1. It may be plus or minus a little bit this way or that, if you are a hair-splitter (it's not really THAT critical though). But for starters, the number you should be "shooting" for is around 250,000. Somewhat higher than that should be fine, but I wouldn't suggest much lower than that.
Hmm, I don't get it. Why this is being brought up again and again??? All I said was that "his" thin-jacket rounds weren't handling his barrel's fast twist rate, at the stated velocity. But if there are folk who believe that something not right about that, I would appreciate it if they would quit beating around the bush, and just say what's on their mind. I sorry, but I just don't have the mental energy to spare on trying to correctly interpret cryptic messages!