I sold my shotmaker this spring , altho the shot I had made with it were not all perfectly round and some had the small dimple in their backside . They all broke the targets when you were pointing the gun in the right general area ! Most shot (unless super hard )Magnum is not perfectly round when it leaves the muzzle anyway ! I was using diesel fuel for a while (watch out for flash point ) Some of the guy's here in Sask. sold there garage to the insurance co. because of it !