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Author Topic: Bore and cylinder measurements.  (Read 465 times)

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Offline Dusty Miller

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Bore and cylinder measurements.
« on: April 29, 2004, 10:03:02 AM »
I found some push-thru slugs that Mr. Smith sent me a few years ago and pushed one thru my bore and one thru each of the six chambers of my cylinder (.44 mag.).  The bore measured out a perfect .429 but the chambers were as follows:
       
                               #1 .4285 to .4290,
                               #2 .4280 to .4300
                               #3 .4275 to .4300
                               #4 .4270 to .4300
                               #5 .4285 to .4305
                               #6 .4285 to .4305

Does this look like a varience that within acceptable tolerance or should I RUN with this gun to the nearest gunsmith and have some work done?
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Offline unspellable

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bore and chamber dimensions
« Reply #1 on: April 29, 2004, 11:52:29 AM »
What make and model is the revolver?
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Offline KN

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Bore and cylinder measurements.
« Reply #2 on: April 29, 2004, 01:02:22 PM »
If it shoots good leave it alone. I doubt that those measurements are off the norm.  KN
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Offline ButlerFord45

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Re: Bore and cylinder measurements.
« Reply #3 on: April 29, 2004, 01:58:19 PM »
Quote from: Dusty Miller

Does this look like a varience that within acceptable tolerance or should I RUN with this gun to the nearest gunsmith and have some work done?


That depends on how well the gun shoots.  If it shoots to your liking, then they are perfect, if not, they appear to be out of round and a bit small.  My limited experience indicates that there should not be a problem with jacketed bullets, however my personal preference would be to round them out to about .001" larger than the bore diameter, but I also shoot mostly lead bullets and this just seems to make things work better.
This sounds like a ruger, they have been notorious for under sized chambers.
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Butler Ford
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Offline Dusty Miller

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Bore and cylinder measurements.
« Reply #4 on: April 29, 2004, 09:21:39 PM »
I'm shooting a Colt Anaconda using a WLN 350 gr. cast bullet from an LBT mold.  The gun is a good shooter but I'm wondering if I have an opportunity to bring those groups in nice and tight, or is it an opportunity to REALLY screw it up?!  I guess the worst that could happen is that I'd have to buy another cylinder?
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Offline ButlerFord45

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Bore and cylinder measurements.
« Reply #5 on: April 30, 2004, 01:12:51 AM »
Don't forget the old carpenters addage "Measure twice, cut once", it definately applys here as well.  It can't hurt to let a good smith at least look at it.  
Out of couriosity, are you having accuracy issues with it, or just wanting to see what might be done?
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Butler Ford
He who does not punish evil, commands it to be done.-Leonardo da Vinci
An armed society is a polite society-Robert A. Heinlein
Only the dead have seen the end of war- Plato
Lord, make my words as sweet as honey
tomorrow I may have to eat them- A lady's sweatshirt

Offline Dusty Miller

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Bore and cylinder measurements.
« Reply #6 on: April 30, 2004, 07:59:28 AM »
The gun is already a good shooter, not outstanding but a good shooter none the less.  I'm thinking that perhaps for a relatively small outlay of cash I might just be able to enjoy a boost in accuracy.  Hey, tighter groups are tighter groups!!
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Offline ButlerFord45

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Bore and cylinder measurements.
« Reply #7 on: April 30, 2004, 12:54:30 PM »
In this particular case, I'd take it to a GOOD smith, tell him what I got and what I'd like and let him be the judge.  If, like me, you have a fondness for lead bullets, there may be an advantage to letting him recut the forcing cone while he has it.
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Butler Ford
He who does not punish evil, commands it to be done.-Leonardo da Vinci
An armed society is a polite society-Robert A. Heinlein
Only the dead have seen the end of war- Plato
Lord, make my words as sweet as honey
tomorrow I may have to eat them- A lady's sweatshirt

Offline jd45

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cylinder throats too small
« Reply #8 on: April 30, 2004, 02:15:20 PM »
Dusty........What Butlerford45 said. jd45.
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Offline Dusty Miller

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Bore and cylinder measurements.
« Reply #9 on: April 30, 2004, 09:07:42 PM »
Hey guys, great feedback, really appreciate it.
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