Blackhawk Convertible 357/9mm

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D_Gunner

Single-Sixer
Joined
Dec 18, 2011
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167
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Florida
I just got a Blackhawk Convertible in 357/ 9mm

How can you tell the 9mm from 357-38spc cylinder?
 

HPD72

Bearcat
Joined
Jul 13, 2016
Messages
6
I had the same confusion when I got mine. I assumed that there would be some indication on one or the other but that's not the case. You can't really do it wrong though as ditto1958 indicated.
 

GaryA

Single-Sixer
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Dec 27, 2001
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Location
Belleville, IL, USA
There is a ledge or "step" inside the chambers. The 9mm cartridge head spaces on the case mouth. The cylinder with the shallower step is the 9mm cylinder because of the shorter case. And ditto1958 is right; the 38/357 will not chamber in the 9mm cylinder. And the 9mm cartridge will slip in too deep in the 38/357 cylinder.

Ruger convertibles are buckets of fun. Enjoy!
 

Jimbo357mag

Hawkeye
Joined
Feb 22, 2007
Messages
10,350
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So. Florida
Perhaps a drop of paint or a mark with a silver 'sharpie' on the ratchet end of the cylinder could ID it for you.
 

BPGuy

Single-Sixer
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Jan 2, 2017
Messages
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Location
New Mexico
ditto1958 said:
A .357 or a .38 special round will not chamber in the 9mm cylinder. That's the easiest way.

A 9mm won't chamber in the .357 cylinder, either. They are actually tapered, and will only go about halfway in. Too damn bad, too. I was going to shoot them in moon clips in my S&W 627.
 

GaryA

Single-Sixer
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Dec 27, 2001
Messages
230
Location
Belleville, IL, USA
A 9mm won't chamber in the .357 cylinder, either.
I'm wiping a spot of egg off my chin. Without thinking or checking I said it would drop too far in like a .45 acp in a .45 Colt cylinder. You, of course, are absolutely correct. The tapered 9mm case will only go in about 1/2 way in a 38/357 cylinder. Thanks for the correct information. I'm not bright, but I'm steady. :D
 

BPGuy

Single-Sixer
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Jan 2, 2017
Messages
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Location
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No worries Gary! You are certainly right about one thing - Ruger convertibles are buckets of fun.! I've got one in .45 LC/.45 ACP.
 

dakota1911

Buckeye
Joined
Mar 26, 2009
Messages
1,021
I put some fake ivory grips on my 357/9mm so I could quickly tell the difference from my 45Colt/45ACP. Massive amounts of fun with the convertibles.

 

gramps

Hawkeye
Joined
Oct 26, 2006
Messages
9,842
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Woodbury, Tn
Yep, I enjoy my NMBH. I bought it from a pawn shop as a .357. Bought a correct 9 mm cylinder from our classifieds. It dropped right in, and shoots good.
gramps
 
Joined
Jan 10, 2005
Messages
3,133
Location
Alexandria, LA USA
I see you got your answer to the alignment question here: http://www.rugerforum.com/phpBB3/viewtopic.php?f=3&t=257569

On the ID, it's easy to see the head spacing step in the cylinder for 9mm is much different and higher up in the chamber.
 
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