VMAX97 wrote:I was reading an article about the issues with reloading 180 gr bullets for .40 and was wondering what other guys were reloading for projectiles in .40 CAL. I am currently loading 180s but would consider 165s, there might be an advantage on reducing potential setback pressures without a downside of power factor adjusting for the lighter bullet with speed. Does this increase felt recoil or is does this equal out?
Seismic Sam wrote:As far as "felt" recoil is concerned, there is NO way of calculating how your nervous system interprets the kick of the gun.
Bessy wrote:Power factor equation is (Weight*Velocity)/1000 = power factorSeismic Sam wrote:As far as "felt" recoil is concerned, there is NO way of calculating how your nervous system interprets the kick of the gun.
Here is how you would measure it for yourself. Load up two different batches that both make the same power factor (say 165gr at 1042fps and 180gr at 955 fps). Run a drill where you shoot a target six times quick as you can. Time it using a shot timer. Do it a few times to get a better dataset. Which ever load gives you the fastest splits between shots on average is allowing a faster shot to shot recovery. The timer doesn't lie. If there is no tangible difference, you probably haven't reached the point where you need to worry about this crap, so just shoot whatever is cheaper, or whatever makes me feel better about yourself.
Return to Ammunition & Reloading
Users browsing this forum: No registered users and 7 guests