I was told shooting the 9mm @.355 would damage the barrel. I would think Ruger wouldn't build a gun that would hurt itself in any caliber that it was designed for. I also believe Ruger is one great gun. What say you all?Thanks. Ridge
.355 is the minimum for 9mm. Can't see how it could cause any damage. Some bullets are cast at .356, .357, and .358, depending on the application. Ruger does indeed build a fine gun and you should be proud to say that you have one.
I too have a Ruger Blackhawk .357,although mine is not a convertible. I have contacted Ruger about a 9mm cylinder and can get one for $130 plus the shipping of my gun one way for factory fitting. Like you, I know that Ruger builds a practically "bullet proof" gun, and wouldn't and couldn't sell a product that was unsafe or knowingly of inferior quality. Also .002" may affect accuracy some, but I doubt it would damage the gun noticeably in your lifetime. Especially seeing as how the forcing cone of the barrel acts like a funnel to guide the bullet anyway.
Actually, this is a fairly popular offering for Ruger. You can get a wide variety of opinions as to the accuracy of the 9mm in the gun but it is safe to assume if 9mm accuracy was a major issue Ruger would not have the sales to keep the offering in their catalog. So, like many guns you should practice until you reach a degree of accuracy you find acceptable.
I just had a .357 NMBH back to the factory to get a 4 5/8" barrel changed to a 6 1/2" and get a 9mm cylinder added. It is very accurate with the .357 cylinder. So far, the 9mm cylinder isn't shooting as well. Not terrible, but not as good as the .357. I need to experiment with more ammo types.
FMJ's are mandatory in the 9mm cylinder. They headspace on the rim, inside the cylinder there is a bit of back and forth play as with most revolvers. Lead may have an issue with shaving off inside the cylinder.
The .38's and .357's are fine with lead. Very accurate. Just watch the velocities on the .357's so they don't lead badly. Usually below 1000 fps is ok.
No ignorance noted, just ask away. People here like to help out.
Back when I owned one of these things, I never could get the 9mm cylinder to shoot as good as the .357 cylinder. I found out later from the guy that I sold the revolver to that the 9mm cylinder was throated to .358". He rechambered it for the .357-44 Bain & Davis and it shot fine. I wish I'd kept it and done that myself.
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