djoch
.240 Incinerator
Posts: 28
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Post by djoch on Oct 18, 2018 8:44:46 GMT -5
Hi. I took possession of a new 5.5” Bisley Blackhawk 45lc/acp yesterday. In all, a very nice piece however upon removing the cylinder I noticed the base pin is longer than the available space between the frame and the lug on the ejector rod. The base pin measures about 3 5/8” in length and the available space is only 3 3/8”, meaning the ejector rod needs to be removed to fully remove the base pin. I have several 5.5” single sixes/ sevens where this is not an issue. Before I call Ruger, is this normal or did someone at the factory install the wrong pin? Also, throats on both cylinders measure 0.450”-0.451”. I don’t reload (yet), but looking for advice on whether I need to have throats addressed (0.4525”)? Thanks.
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Post by wheelguns on Oct 18, 2018 8:57:05 GMT -5
It is normal. You can fully remove a S6 base pin, however you cannot on a full size blackhawk. Personally I like the S6 setup. It makes it easier to clean.
How did you measure your throats? You really need to do this with pin gauges. If that is how you did it, I apologize. It is very common for .45c ruger single actions to have tight throats. If you don’t have pin gauges and a reamer, your best bet would be to contact 2 Dogs on here with a private message. He will get you fixed right up.
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gunzo
.30 Stingray
Posts: 423
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Post by gunzo on Oct 18, 2018 9:02:17 GMT -5
Welcome to the forum.
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djoch
.240 Incinerator
Posts: 28
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Post by djoch on Oct 18, 2018 9:11:56 GMT -5
Wheelguns, yes I used pin gauges. The 45acp has 0.450” throats; three throats on the 45lc are 0.450” and three are 0.451”. Will having a third party resize throats give Ruger an excuse to void the warranty?
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Post by bobwright on Oct 18, 2018 9:30:22 GMT -5
Before you go measuring and tinkering with your revolver, shoot the blamed thing first!
Then, if all is not right, begin tinkering around with your gun.
Incidentally, Ruger intentionally used the "too long base pin" so it would not be dropped in the dirt when swapping cylinders.
Bob Wright
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Post by sheriff on Oct 18, 2018 11:46:13 GMT -5
Before you go measuring and tinkering with your revolver, shoot the blamed thing first! Then, if all is not right, begin tinkering around with your gun. Incidentally, Ruger intentionally used the "too long base pin" so it would not be dropped in the dirt when swapping cylinders. Bob Wright Great advice!!
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edk
.375 Atomic
Posts: 1,092
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Post by edk on Oct 20, 2018 6:01:02 GMT -5
Wheelguns, yes I used pin gauges. The 45acp has 0.450” throats; three throats on the 45lc are 0.450” and three are 0.451”. Will having a third party resize throats give Ruger an excuse to void the warranty? Maybe a little drift here but does anyone know if Ruger is still using the gang reamer approach on the full size Blackhawks? I thought getting away from that was what made the mid-frames so uniform.
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Post by dale53 on Oct 22, 2018 23:47:34 GMT -5
I have a Ruger SS Bisley .45 ACP/.45 Colt Convertible. My throats were undersize, also. The .45 Colt leaded terribly. I couldn't even load my home cast .45 ACP's with a .452" cast bullet. So, I reamed both cylinders and those of two of my friends' guns (to .4525"). Now, they shoot extremely well with both cylinders.
I highly value my convertible, now...
FWIW Dale53
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Fowler
.401 Bobcat
Posts: 3,546
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Post by Fowler on Oct 23, 2018 11:02:43 GMT -5
Wheelguns, yes I used pin gauges. The 45acp has 0.450” throats; three throats on the 45lc are 0.450” and three are 0.451”. Will having a third party resize throats give Ruger an excuse to void the warranty? Maybe a little drift here but does anyone know if Ruger is still using the gang reamer approach on the full size Blackhawks? I thought getting away from that was what made the mid-frames so uniform. I think they still do it the same way, I think they made new tooling for the smaller cylinders and that's what set the throats to correct sizes. As the reamers wear and are resharpened they will shrink the finished throat sizes and I think the .450" +/- throats we have been seeing for years on the full sized guns was a product of old tooling that is very worn more than anything else. Seems they would just replace them but the evidence doesn't seem to support that thought... Also most Rugers will benefit from fire forming after the throats are corrected www.gunblast.com/FerminGarza-Firelapping.htm, to one degree or another...
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nicholst55
.375 Atomic
Retired, twice.
Posts: 1,029
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Post by nicholst55 on Oct 23, 2018 16:38:29 GMT -5
My Lipsey's mid-frame .45 convertible had a minimum of two different diameter chamber throats in both cylinders - plus thread choke, plus transfer bar pinch. Not too certain that Ruger has 'fixed' that issue, myself.
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Post by wheelguns on Oct 23, 2018 16:46:08 GMT -5
What is transfer bar pinch?
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nicholst55
.375 Atomic
Retired, twice.
Posts: 1,029
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Post by nicholst55 on Oct 24, 2018 5:37:01 GMT -5
Transfer bar pinch is where the depth of the transfer bar striking surface is not cut deep enough to clear the TB. There should be a very slight clearance there there when the hammer is at rest - just enough to allow the transfer bar to move freely. When there is no clearance, there is a greater likelihood of the transfer bar breaking. It also reduces the amount of energy transferred to the transfer bar and firing pin by the hammer. This can cause light strikes and misfires. Jerry Kuhnhausen discusses this on page 149 of his Ruger Single Action Revolvers Shop Manual - although he doesn't call it transfer bar pinch.
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Post by msauter on Oct 24, 2018 17:43:55 GMT -5
Picked up a new 45 Flattop convertible today. I don’t have pin gauges to check the throats, but hope to see how it shoots tomorrow. I use plated bullets.
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Post by Encore64 on Oct 24, 2018 17:46:42 GMT -5
Picked up a new 45 Flattop convertible today. I don’t have pin gauges to check the throats, but hope to see how it shoots tomorrow. I use plated bullets. I bought that same gun with the 5.5" barrel. It did have tight throats at .250-.251". About 30 minutes with my .452" throat reamer and now it's great. One of my favorite revolvers.
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Post by cas on Oct 25, 2018 1:17:39 GMT -5
Wheelguns, yes I used pin gauges. The 45acp has 0.450” throats; three throats on the 45lc are 0.450” and three are 0.451” That is assuming they're round! (oh I wish I were joking)
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