My Dad had one he used for Bulleye competition (1960 's)and I had one years later. Very accurate. I don't recall any preference for a particular brand of ammo. The one my dad had, came with two barrels, 5.5" and 6.5 or 7" IIRC. the longer had what seem to be a muzzle weight.
MSRP is $1179 and I've occasionally seen them, pre-owned, at gun shows and local stores at around $600-700. One barrel only.