sorry martinfaw i didnt see this post untill just now lol. i havent tryed the roundball loads in a pistol yet but i have had great results with my marlin 1894. as long as you keep the range short they roundballs will be very accurate. i load the balls so they are flush with with the case mouth and rub bullet lube into the spaces the ball dosent fill up. ive tryed just about everything to try and get them to cycle throught the action with no efffect.