That's just another internet myth...
Whether a fully-stabilized bullet rotates 1.7 or 2.1 times during its travel through the chest of a deer will not make any notable or significant difference in terminal performance.
Incorrect. To a point. Increasing RPM's (by increasing twist) helps lots of bullets open up better and/or more. With bullets on the frangible side, they can come apart much more violently than with a slower twist.
