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Old September 29, 2012, 10:13 AM   #68
Webleymkv
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Join Date: July 20, 2005
Location: Indiana
Posts: 9,876
Originally posted by dahermit
Quote:
Quote:
A S&W hammer block can break just as easily as a Ruger transfer bar, so both designs are roughly equal in that regard.

God forgive me, I am going to throw gasoline on the fire.
I have read more incidents of Ruger transfer bars breaking than S&W hammer blocks breaking. As a matter of fact, when I routinely peruse the gun smithing forums, I have seen several instances of Ruger transfer-bar failures but I do not remember any instances of S&W hammer blocks failing. So, that would seem to indicate that both designs are not, "...equal in that regard..." Unless you want to blame it on the part and not the design, that is.
Originally posted by Malamute
Quote:
Quote:
A S&W hammer block can break just as easily as a Ruger transfer bar, so both designs are roughly equal in that regard.

That's news to me. I'm interested where you got that bit of information.

I've haven't had, or heard of a Smith hammer block breaking. It isn't a part thats even stressed, unless the gun is dropped on the hammer. Transfer bars are stressed every time the gun is fired or dry fired.
Here's a report complete with pictures:

http://thefiringline.com/forums/showthread.php?t=413431

And Grant Cunningham mentions the issue here:

"Save for the aforementioned Colt firing pin issue, parts failures in revolvers are very rare. Other than things like hammer spurs being broken from impact or cylinders being blown apart by faulty handloads, broken parts are few and far between. The only major exception that occurs to me is the hammer block safety in very recent Smith & Wesson "J" frame revolvers (those with external hammers only - the shrouded hammer Centennial series does not have that part.) This part is relatively thin and S&W decided to make it with the MIM (metal injection molding) process."

http://www.grantcunningham.com/blog_...c8b9-1043.html

I've not personally seen nor heard that many reports of hammer blocks or transfer bars failing, so I really don't think that either case is particularly common, but they're not impossible.
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