GURPS ULTRATECH ballistics?

hal · 04-01-2017, 10:45 PM

Anyone know how to calculate the recoil of the bullets we're discussing? A .45 colt black powder weapon has a Muzzle Energy in Joules of 500 plus change. A weapon with one that is a little over twice that of a .45 colt should have a recoil of what?

Oh, I was looking at the wrong column on my spreadsheet for the ME in Joules. I was trying to get that to 1213 when I played around with the need to have 1213 Joules for 1.5 grams of propellant.

New damage is now:

3d+1 (Average damage is supposed to be 11.9) so maybe 3d+2?

Oooops, but not a major one it seems. Bullet weight remains what I figured at 2 grams, and damage is about the same, just 1 pip less.

So, anyone? How does one calculate the recoil statistic? Is it a factor of barrel length plus weapon weight or something along those lines?

04-01-2017, 10:45 PM	#11
hal Join Date: Aug 2004	Re: GURPS ULTRATECH ballistics? Anyone know how to calculate the recoil of the bullets we're discussing? A .45 colt black powder weapon has a Muzzle Energy in Joules of 500 plus change. A weapon with one that is a little over twice that of a .45 colt should have a recoil of what? Oh, I was looking at the wrong column on my spreadsheet for the ME in Joules. I was trying to get that to 1213 when I played around with the need to have 1213 Joules for 1.5 grams of propellant. New damage is now: 3d+1 (Average damage is supposed to be 11.9) so maybe 3d+2? Oooops, but not a major one it seems. Bullet weight remains what I figured at 2 grams, and damage is about the same, just 1 pip less. So, anyone? How does one calculate the recoil statistic? Is it a factor of barrel length plus weapon weight or something along those lines?