I just jumped into Double Rifle World (470 NE) and read that TKO was a created by Taylor mostly for missed brain shots when hunting elephants. Enough TKO and the animal goes down from the power, a sledgehammer effect. Even when you miss the brain.
Back to 20 slugs, I will try cutting these wads for now. Can't get real 20 brush wads, got something else coming from Siarm now though.