RE: 9mm luger for deer hunting???
Camp, check out my post above...in factory loads, what you've "learned" is basically correct, the optimum bbl length for typical factory 9mm rounds is about 10-12" for maximum powder efficiency. However, if you load a slower burning powder to the maximum pressures that your RIFLE is rated to (typically considerably more than handguns), the 9mm +P+ becomes a much more viable round.