Read it through once

The flames bit him, and the hot smoke broiled his skin. His rifle barrel grew so hot that ordinarily he could not have borne it upon his palms; but he kept on stuffing cartridges into it, and pounding them with his clanking, bending ramrod. If he aimed at some changing form through the smoke, he pulled the trigger with a fierce grunt, as if he were dealing a blow of the fist with all his strength.