See the For sale sector for more details- and have your Houchins' handy-also, my two Parker twist barreled PH grades (16 mfg. 1908) and 12 (mfg. 1904) both pattern the RST lite load No. 8"s high from only the right barrels- the left tube on both guns is close to perfect to POA- I also use 2 &1/2 dram equiv. lite AA 12 skeet loads in the 12 PH- deadly on barn pigeons, but also shoots that load high to POA from only the right barrel- Possible concentricity issues??