Magazine Zbraně a náboje 03/2019

... the manufacturer came up with a weapon, which on paper seems to be the larger brother of the original Gladiator and in his hand rather double-barreled percussion cannon in pocket format: Gladiator .500 HD, derringer in a caliber of half an inch.

Using heavy projectiles and fast Black Powder such as the Hodgdon Triple Seven, the Gladiator's muzzle energy can compete boldly with .45 ACP caliber weapons. Taking into account the weight, instability and soft material of the bullets, the effect at the target is likely to be overwhelming - it can be assumed to be higher than most conventional short personal defense weapons.