Antipersonnel canister shot was employed with deadly effect. Regiment of Foot was wounded by canister shot. Trias attempted a counterattack but his lancers were halted by canister shot. The defenders detonated the perimeter Claymore mines and responded with small arms and Canister shot. The 10-pounder Parrott rifle fired case shot (shrapnel), shell, and canister shot. The 20-pounder Parrott rifle fired case shot (shrapnel), shell, and canister shot. Canister shot also hit the side of a waka. Canister shot hit the side of a waka. Canister shot was effective out to a distance of . The 20-pounder could also fire high-explosive and canister shot shells. It could also fire canister shot and spherical case shot. Canister shot was effective up to a distance of . The large, low velocity gun could fire a large explosive shell or canister shot. As such his invention increased the effective range of canister shot from to about . Canister shot is a kind of anti-personnel artillery ammunition.