Blackpower 65mm proofs with right open & left choked. I would say to equate the pressures, say less than 7000 and use 2 1/2" shotshells of 24gm to 1 oz of shot, i.e. RST "Best" Grade or Polywad's Vintager(24 gm, 5-6K PSI at 1175 FPS-Polywad numbers).

Kind Regards,

Raimey
rse

Last edited by ellenbr; 10/14/07 09:52 PM.