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I have a Ruger Blackhawk 45 LC that has chamber throats measuring from less than .450 to some that are .451. No local smith does this work is there a way I can do it myself?
What is the ideal chamber throat diameter for a 45 LC? Thanks

(Edited by redhawk44p at 2<!--emo&:0--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'><!--endemo-->8 pm on May 23, 2001)
 

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Beartooth Regular
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Hello,

Ideally you want the chamber throat diameters uniform and either the same or slightly say, .001" larger than the groove diameter of your barrel. You'll need to slug it to find out.

You could try it yourself but if it were me, I'd send the cylinder out to be done by a good smith or possibly call Ruger and explain your problem to them.

Stillwell Tool and Die will hone out a cylinder as well as other fine smiths I'm sure will be recommended soon.

http://rstillwe.home.texas.net/stdprice1.htm

If you just send the cylinder, you won't get into the BS with shipping a complete gun.

FWIW


Regards,

:cool:
 

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Redhawk- Contender is completely correct. Slug the barrel first. I don't want to alarm you, but most 45 Blackhawks that have passed my way are also constricted in the barrel, where it's screwed into the frame. If this condition exists with your gun, it must be corrected too, otherwise, you may not have much success with cast bullets. I wouldn't get my hopes up about Ruger fixing the gun. We've contacted them on a few, and they always say that the gun meets their "specifications". Another possibility is Jim Stroh, at Alpha Precision. If cast bullets are your thing, he can also "Taylor throat" your barrel.----------------------Bob
 

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The Hog Whisperer (Administrator)
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You can also get Marshall's tech guide, which explains how to do it yourself.  It is not too hard.  If you are capable of loading good safe accurate ammo, you can easily lap cylinder throats at home by following the directions carefully.

The tech guide suggests 0.002" - 0.003" over groove diameter, but I've done 0.001" and it works also.  The larger diameters just compensate for eventual throat wear.

Slug your gun and go from there.  Let us know what the slug reads.
 
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