Question: Rex, What would you say is more important in handgun ammo, SD or energy? I find that in most cases they go hand in hand, but when comparing 10mm which had higher energy to .357sig which has higher SD, I am confused on which would be considered superior. Thoughts? PS. I tried pasting links to the ammo but it wouldn't let me. -Hornady's 10mm xtp 180g has 464ftlbs@50yrds and SD of .161 -Hornady's 357sig xtp 147g has 422ftlbs@50yrds and SD of .167
Rex: Lethality is contingent upon the destruction of vital tissues, which primarily requires enough penetration reach such tissues... afterwhich, hydrostatic shock (facilitated by energy) greatly contributes to the destruction of those tissues. In simple terms: First the bullet needs to get there, then once its there it needs to destroy what it has reached. My preference would be 10mm... based on a significantly increased frontal area, contributing to a more violent hydrostatic displacement, which in the old days was known as "knock down power".... but thats just my take :-) What do you guys think?