I have a New Model Ruger Super Blackhawk in .44 Special/.44 Magnum, which is 24 years old. Lately I have been having trouble extracting .44 Mag cases. Could the cylinder be bell-mouthed? I shoot a lot more .44 Specials than Mag loads. If so, how can this condition be ascertained? Is there a fix or am I only to use Specials from now on?