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Anyone use RCBS Precision Mics

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Unread 06-30-2009, 09:51 PM
Gold Member
Join Date: Jun 2006
Location: Shangri-La
Posts: 948
Re: Anyone use RCBS Precision Mics

I use a manufactured rod that takes measurements to determine COAL that is similar to the cleaning rod marking method. I bought it from R-P Products 318-424-7867 or about 4 years ago for $25.00 (so I don't know if the contact numbers are still good). Shown here with the Hornady tool

You just insert the rod to the bolt face and lock the rear collet

remove the bolt, insert the bullet to the lands and hold it there (the Hornady tool is an excellent way to do this) and insert the rod to the bullet tip. Then lock the front collet

and measure between the collets

Then set your seating die for COAL based upon that particular bullet you used. I get much more consistant measurements than the Hornady tool and you are not off by the amount of headspace or head clearance on the modified case.

I think someone makes some locking collets to put on cleaning rods that do the same thing. Seems to me you could go to Home Depot and get a 30" aluminum rod that is 1/4" and get a couple of those locking mechanisms you put on the inside of window frames to keep thieves from opening the window. Make your own.

IME, marking a cleaning rod with tape or a marker is not very exact because it is hard to measure to the 1/1000" when you are measuring to the edge of a piece of tape or marker.

If you can read this, thank a teacher.......if you are reading this in English, thank a soldier.
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Unread 07-01-2009, 06:02 AM
Silver Member
Join Date: Mar 2002
Location: Casselberry, FL
Posts: 192
Re: Anyone use RCBS Precision Mics

Woods .........
I've seen that method used before, and it works. However, that's like changing a light bulb by holding it securely and spinning your house around to thread it into the socket. A simpler method would be quicker and easier.

- Innovative
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