I have several smoothbore pistols. The best one for shot is my Tower .67cal. I shoot 35g of 3F and 1oz of 7 1/2 shot, it patterns well to about 15 yards and has taken several grouse. It also is fun with PRB, no sights on it but its a hoot to shoot. I also use a .54 cal smoothbore, it shoots prb very well and is ok with a 3/4 oz load of shot also with 35g of 3F. Good patern out to 20 feet.The .67 has a 9inch barrel and the .54 has a 11 inch barrel.