Why did my Muzzle Loader accuracy get worse? Savage Moderator April 11, 2013 20:31 Follow Many factors can affect the overall accuracy: non-recommended load or loading technique non-recommended primer constricted breech plug worn vent liner bulged barrel Related articles Where is the 350 shotgun made? What type of primer should I use in my muzzle loader? Where do I send my firearm for service repairs? Where do I find parts information or gunsmith services on older model Savage products? What the expected accuracy of my rimfire?