Sectional density (by itself) isn’t worth spit, therefore it can’t be ‘king’ of anything. Sectional density can only ever matter if every other characteristic of the bullet is properly matched for the game...... otherwise (to use your own agenda) shoot FMJs and tell us how awesome that high SD is for dead animals. I get it: you’re an SD true believer. However, good bullet construction can overcome low SD. High SD can’t overcome bad bullet construction.
