I've had a 7.5" S. Blackhawk in 44mag for about six months. I've been having a tough time learning how to shoot it. I'm a pretty good pistol shot so it is bothering me, something is wrong. I think it may be my grip, but with one factory load and 4 lead reloads it appears to be a bit ammo picky too.
I've developed a grip that is moderate in tension. I find I get better accuracy while preventing limp wristing. The 44 moves around in my hands with this grip. I'm thinking the barrel is moving before the bullet leaves the muzzle. When I put the death grip on it the groups tighten up a bunch. I've never used a set of Houge wood grips. I think they would help a bunch while keeping the wood look..
The 44mag "OM" Vaqueros are basically a Blackhawk with cowboy sights. Mine is 4 3/4" barrel Stainless with a fluted cylinder.
Mine shoots everything fine from 44 Russian, 44 Special, shotshells, and 44 mag without problems. I found a mother load of
Blackhills 44-Russian for $11 a box so I've been having fun with those a bit.