We could discuss wheather the .30 carbine is a rifle or pistol round till the cows came home but thats neither here nor there. As you said its not a very impressive round but it does work... I dont doubt your displeasment using the round on jack rabbits because the round generaly dosent expand very quickly and it would have just punched a hole through the jack' without deposting much energy into it. And as for the 32-20 an oldtimer near me used one for years on deer and it works too, you just have to know their limitations.