Ron
the reasons, well all guns kill, semi-auto or wheel gun a bullet is a bullet. A wheel gun is safer, you are less likely for an accidental discharge but having no semi-auto's would change nothing. Now before everyone goes off. Most duck hunters and bird hunters today use a seni auto shotgun for very good reasons. They are much faster and more accurate.   A semi auto handgun is more accurate. The wheel gun requires the round to spin and no matter how good the gun the cylinders all have some degree of misalignment and flash- as opposed to eject and load as in a semi. One can hold the target far better with a semi auto. Recoil as bob stated depends on the caliber with any gun but a semi auto is back on target far faster. Now should people be required more training on them ... YUP . In addition the trigger pull of a semi which determines accuracy is much lower, 2-3 lbs vs 10 again providing far more accuracy.