Very good info. I have a 410 for HD as mama can't handle a 12. It is designed for HD and we heep slugs and buck in it. Inside a house I think a 410 would be devastating.
Thunderhead .410 3” 168 grain hollowpoint slug....This slug has a velocity of 1,400 feet per second which yields over 800 foot/pounds energy which compares directly to a .44 Remington Magnum.
Ultra Buck buckshot. These 3” rounds carry 5 balls that are .375” diameter and weigh 78 grains each. Nobody else in the world makes a .410 buckshot this big so we’re calling it, ‘0000,’ or 4/0 buckshot. Each ball has similar penetration and energy to that of a .38 special. To put it another way, shooting something with this load is like shooting it with a .38, 5 times, ALL AT ONCE!!! With a velocity of 1,100 fps these FIVE balls generate more than 900 foot/pounds energy...