I have a CZ 75BD 9mm and was thinking of getting the kadet kit, but figured it would take 2.5 years to pay for itself based on 9mm( .20 cents per round) vs .22 ammo price( .5 cents per round), rounds shot per month( est 100), and cost of kit.( $400)
.15 saved on each shot, x100 per month, x 30 months
Thats also assuming you would shoot the same amount of .22 as you were 9mm, if you triple your .22 shooting because its cheaper, you may not really be saving any money, but would get more shots for less money.
Does that sound about right?