the score slugs and challenger slugs are gualandi slugs, not brenneke. they're about as close as you're gonna get to a true original brenneke; solid slug, harder alloy, attached wad, flat or rounded nose leading into a sharp shoulder as opposed to foster slugs with a rounded shoulder into a hollow point. i've found rottweil brenneke classic 2 3/4" and brenneke 2 3/4" short magnums at reliable gun in van and as well as rottweil's exact slugs which are a gualandi slug. i like the brennekes better, hit harder and a little better accuracy from my mossberg. when i'm out solo camping and bushwacking in the central and south chilcotin mountains, where if a grizz see's you or smells you they will certainly try to eat you, my gun is loaded up with the brenneke short magnums. if i could find the brenneke black magics, those would be in my gun