All, you need to be aware the Marlin's Microgoove Rifling was developed for use with Jacketed ammunition and there are widespread reports on the net of leading and poor accuracy when shooting lead with this type of rifling. IMO a good look down the barrel of your camp 9 is in order. If the rifling looks like that in your model 14 you have a Ballard rifled barrel. If you see a lot of shallow lands and grooves you'll want to use plated or jacketed bullets.