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Author Topic: neat coal guage you can make  (Read 274 times)

Offline sundowner

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neat coal guage you can make
« on: July 24, 2018, 12:11:09 AM »
Found this on the web , there is a video showing on the web if I find it again I'll post it . Here's a link to the article .
http://bulletin.accurateshooter.com/2012/07/tool-tip-make-your-own-length-to-lands-gauge/
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Offline BoBallistic

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Re: neat coal guage you can make
« Reply #1 on: July 25, 2018, 07:11:22 AM »
Sundowner - This is one of my favorite website that I visit all the time, next to Talk Hunting of course!! but many years ago, probably back in the early 80's I knew this was a problem so I set out to find a solution. This device was made long before Hornady came up with there's.....

You take and dedicate a small 22 caliber cleaning rod and a blunt end tip along with a couple of pieces of round aluminum bar stock also a small (1/4 in diameter) dowl about 12" long. They must be drilled and tap for a set screw as shown.... I also use this cleaning rod as the twist rate rod, to determine the twist rate in the barrel. There is a 18" thin black tap on the back side of the photo which I should have shown but for some reason, did not?? Go figure

What I do is to make sure the rifle is unloaded and if the rifle, shotgun or pistol comes into the house it is unloaded for sure, but after I take all those safety precautions, I removed the bolt look down the barrel to see the light and then reinstall the bolt and run the 22 rod down the barrel and set the back one of the alum round bar stock stops in place and then remove the bolt again and stand the rifle onto a rag onto the floor, without the bolt...now I drop the bullet down the barrel until it hits the lans then I use the 12 wooden dowl to gently (basically hold the bullet in place) tap and and then set the rifle in the gun rest and reinsert the cleaning rod until it stops on the end of the bullet tip. Next take the front alumin stop and use the set screw down and then measure between the two and this will give you the COAL of your bullet....Now its not over with yet, I do this 5 times and write down each time simply because the bullet you are dropping down the barrel may get misaligned or cant angle could be skew, but I do this 5 times and document it on the rifle spreadsheet that i have set up for each rifle...I then take the average of the measured distances and use the "average" of all 5 drops.....

Attached are photos of the dedicated 22 cleaning rod and the 2 aluminum stops that I used.....this is how I have been doing my COAL for over 30 years, it works for me....


   
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Offline sundowner

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Re: neat coal guage you can make
« Reply #2 on: July 25, 2018, 07:58:47 PM »
Well Bo I have a Franklin arsenal gauge that I have used and the cousin has the Hornaday gauge but I'm going to try this and see how it works . All reloaders has spent used cartridges and this way will give you the COAL of the cartridge that you are reloading at the time not a generic COAL > I've got the cartridges and the Dremel  tool any way .  ##$%#1118
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Offline BoBallistic

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Re: neat coal guage you can make
« Reply #3 on: July 26, 2018, 01:00:16 AM »
Sun - Am glad most hand loaders and manufacturers recognized the need for one of these type tools and they have a couple to choose from....

mine was developed in about 3 months time from start to finish, had to get the "stops" made at the plant I was working at....had to develop a work plan, give them a bogus numbers and allow cost analysis for it...told them that it dampens out vibration on small tubing at the ends and is needed to prove my point so I put "prototype" and would check it out......this is from the same nuke plant that got one of the two Stainless Steel Shrimp boats before getting caught on the second, Yes I am talking about the famous Waterford 3 Nuke Plant located in Luling and Hahnville in Louisiana....about 90 miles west of New Orleans...Yes, those guys...and they were characters for sure!!! But they got it done.....have not told this story to anybody.....got another set made when I worked at the Watts Bar Nukie Plant back in the late 80's....LOL....Most of the guys were building and selling stainless steel traceable tubing belt buckles for $20 each and have one of those too, No the paperwork did not come with the belt buckle...LOL...

Back to New Orleans - All we did was eat sleep work and worked OT in New Orleans, 6 days a week...the only day off we had was the day after Fat Tuesday and whenever the Saints had Monday Night Football and when Howard Cosell, Frank Gifford and Don Meredith was doing the shows....LOL....boy those were the good old days.....

The test as far as dampening out vibrations actually worked and the results showed that this method would work on smaller bore tubing, but the project was abandon and quietly disappeared (to my possession), because it wasn't thought of from the Client!!! but I have the two 1/4" "stops" as you see in the photos, I drilled and tapped the holes in the side of the "stops" in my Apartment in west New Orleans....besides you have already main COAL tools in the Hornady, RCBS and Franklin.....much easier and simpler to use!! 
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Offline Dutch-Hunter

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Re: neat coal guage you can make
« Reply #4 on: July 26, 2018, 04:10:25 PM »
Just got this months Midway sale flyer. They have Hornady Bolt Action OAL gauge on sale for $29.49 and Lever/Automatic for $33.49. Comparator Sets $26.99 for 6 Insert set & $43.99 for 14 Insert set.
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Offline BoBallistic

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Re: neat coal guage you can make
« Reply #5 on: August 05, 2018, 02:16:42 PM »
If I had to do it all over again, I would take Dutch's advise and spend the money and buy one!! but since I am so used to the one I have had for so many years, I will stick with the "rig" I have now, gotten use to it....have a hand written notebook full of dimensions that I have taken over to years....and think that it would be a good time to make another spreadsheet out of it..........

 
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Offline gobihawk

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Re: neat coal guage you can make
« Reply #6 on: August 06, 2018, 02:05:50 PM »
Great info. I use the Hornady gauge. Works great. I do the coal test three times and average it. Next time I will do three and five test average.
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