martinfaw
I have two and they are both great shooters... but I do use .45 cal bullets...
I am thinking if you bought it used - no mater how clean the bore looks - clean it - clean really well all the way back down to bare metal.
Just as an example - I shoot 100 grains of loose T7-2f with an MMP HPH-24 black sabot and a 300 grain Speer or Hornady bullet at paper. This combination really works well for me...