The very early Blackhawks and Super Blackhawks were spotty as far as accuracy goes. Ruger farmed out barrels. I'm the 80's I shot a lot of pistol silhouette and I still had a FFL. I went through a few Super Blackhawks before I found one that was very accurate. I believe any Blackhawk or Super Blackhawk made in the last 30 years aught to be good.
Had 4 SBH. Two of them 3 screws. None were bad, but two were fantastic (one OM and one NM).
