01-31-2022, 06:35 PM
Zeneffect Wrote:It wasn't competition, just some fun shooting. Targets were preset when I got there so no chance to see how they were set. In competition I would most definitely set my own. I think just not enough power to knock over the ram as I was very clearly hitting center mass and could see the marks very clearly (or maybe aiming for center was the problem?)
Ballistics calculator is showing it should be about 830fpe at target, and I cant do the math to see what that does against a 20kg+ steel ram (is there a good
Formula or general guideline?)
*edit* oh what google can do.
"The theoretical minimum for Ram knockdown is a Terminal Momentum™ of 0.7; the closer to 1.0 the better. TM is calculated by multiplying the remaining velocity at 200m (FPS) x bullet weight (grains) divided by 225200 (constant). Ex. 140 Grain bullet w/ a muzzle velocity of 1758 FPS and a 200m velocity of 1459 FPS = 1459 x 140 / 225200 = TM of 0.91." now i need to figure out this math lol. im a stupid person.
I get .75 flb/s if I swag a very liberal 1300 fps velocity at 550 yards. I would think a guy would want the result based on the true distance of 500 M and not 200 M.
I used a mass calculator and not that formula you found. I am pretty sure it will correspond to that really strange formula you found.
When you figure out your velocity at 200M, how about posting your result and lets see if we are close?
LR55