Just an FYI for people, you can plug numbers into the link below to calculate recoil force. The only 'variable' is the value for gas speed, which for handguns is usually 1.5, the same that SAAMI uses, at the second link.
http://kwk.us/recoil.html This uses the default value of 1.5 for gas speed, but can be changed.
SAAMI: https://saami.org/wp-content/uploads/2018/07/Gun-Recoil-Formulae-2018-07-9-1.pdf
Still don't know how Carl got his numbers. What value did you use for gas speed?
Edited to say: I used a standard value for 115 grain bullet from a 4" barrel. However, since these are guns with shorter barrels, the velocity will be lower, and won't be the same for all guns. The proper method is to shoot and chronograph each gun and see what the actual speed will be, then use that in the recoil calculation.
http://kwk.us/recoil.html This uses the default value of 1.5 for gas speed, but can be changed.
SAAMI: https://saami.org/wp-content/uploads/2018/07/Gun-Recoil-Formulae-2018-07-9-1.pdf
Still don't know how Carl got his numbers. What value did you use for gas speed?
Edited to say: I used a standard value for 115 grain bullet from a 4" barrel. However, since these are guns with shorter barrels, the velocity will be lower, and won't be the same for all guns. The proper method is to shoot and chronograph each gun and see what the actual speed will be, then use that in the recoil calculation.