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  #1  
Old 04-04-2010, 01:01 PM
1911Collector 1911Collector is offline
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How to properly read Redding competition seating die measures




I finally succumbed and bought a Redding competition seating die in 45 Auto. Not advertising for them but this is one well constructed die. The trouble I have with it is reading the measures on the micrometer and how it corresponds to OAL.

I read the instructions that came with it several times. It notes that one full turn corresponds to .050" and each tick corresponds to .001".

It then notes there is a "zero" feature that moves the seating stem but not micrometer.

My questions are this:

1. If I'm trying to set a 1.260" setting for say 230 Gr. TMJ RN what value would I use??

2. If I then want to say switch to a SWC pattern and use the zero adjustment wouldn't it then change the setting/adjustment for 230 Gr. RN??

3. Should I even try to correlate the two or just caliper to my desired COAL and make note of the set value for each??

Seeking opinions. Thanks!

-1911Collector
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Last edited by 1911Collector; 04-04-2010 at 08:04 PM.
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  #2  
Old 04-04-2010, 02:37 PM
ClarkEMyers ClarkEMyers is online now
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My own practice is to caliper then use the Redding mic to adjust.

My own practice is to caliper then use the Redding mic to adjust. Surely there is no zero setting or any other OAL on the mic as shipped given the variety of bullets and ogives. One use of the Redding design is to make adjustments from the top easy on progressive presses.

Time was I calibrated the conventional seating stem in my RCBS dies by dividing the top of the die and calibrating where the screw slot pointed.
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Old 04-04-2010, 04:19 PM
DAGONET DAGONET is offline
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Just use the reading on the die as a reference and record your settings. They are more for exact bullet movement and repeat reset than setting inital oal.
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  #4  
Old 04-04-2010, 06:20 PM
sophijo sophijo is offline
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Redding Seating Die

I set the Mic at about half-way up the scale then initially seat whatever bullet I'm using with the allen wrench; calibrating with the Mic. Always check with calipers.
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Old 04-04-2010, 08:32 PM
1911Collector 1911Collector is offline
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Thanks guys!

I'll caliper to get COAL and mic it as a reference and fine tune. I've heard/read that the inside dimensions and seating stem give very exact and repeatable results.

Just installed it, can't wait to see how precise this die can get.

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Old 04-04-2010, 08:39 PM
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Tom Freeman Tom Freeman is offline
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Dont use them with lead bullets and all will be well.

Really nice dies. I use nothing but them and Forester.
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Old 04-27-2010, 07:46 PM
PROGUN PROGUN is offline
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"Dont use them with lead bullets and all will be well." ???

How come? I have been loading 200gr lswc for over two years with mine and the die has been dead-on.
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  #8  
Old 04-30-2010, 06:54 AM
lon lon is offline
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Quote:
Originally Posted by ClarkEMyers View Post
...I calibrated the conventional seating stem in my RCBS dies by dividing the top of the die and calibrating where the screw slot pointed.
Yes, thats a handy way to get close. My RCBS seating stem is threaded at
28 threads per inch. I use the screw slot and eyeball the amount I turn it.

90 deg. = .009" bullet movement, 180 deg. = .018", etc. Then tune it in with
the calipers.
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  #9  
Old 05-02-2010, 02:50 PM
Otto Otto is offline
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Quote:
Really nice dies. I use nothing but them and Forester.
Yes, I would use Forster micrometer dies if they made them for handgun cases.
Can't see why they don't make them.

I use a 45ACP Redding Competition seater with lead and never had a problem.
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Old 05-02-2010, 03:09 PM
1911Collector 1911Collector is offline
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Just a quick report on the Comp seating die now that I've had a chance to use mine a few weeks.

It seems 90-95% of the time I get accurate results in that once a certain seating depth has been dialed-in then loading subsequent rounds results are repeatable. For example, if my target for 9mm 115 gr. RN is 1.135" then I might get some slight variation +/- .001 or .002" on each round. Then sometime I'll get a completed round calipered with 1.145" depth but I'm not sure why. One thing I load is with mixed cases and understand that overall case thickness would vary from manufacturer to manufacturer so why would seating depth change all else being equal??

I've had dies back out before but in this case I kept a close eye on the seating die to ensure eveverthing was consistent. Could anyone using the Redding Comp die share their insights or offer up what they experienced.

Thanks in advance.

-1911Collector
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Old 05-03-2010, 08:45 AM
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Tom Freeman Tom Freeman is offline
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Quote:
Originally Posted by PROGUN View Post
How come? I have been loading 200gr lswc for over two years with mine and the die has been dead-on.
The lead can build up and gun up the works.

But if you are using lead and its working, press on.

I might have been using bullets with too much lube or not enough case mouth bell.
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  #12  
Old 05-03-2010, 10:21 AM
sophijo sophijo is offline
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I had same issue with mixed cases and separated them out. Now I'll load a batch of Winchester or a batch of Fiocchi, set-up for each new batch. That seems to have solved the problem.
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Old 05-03-2010, 12:40 PM
Glenzo Glenzo is offline
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Quote:
Originally Posted by sophijo View Post
I had same issue with mixed cases and separated them out. Now I'll load a batch of Winchester or a batch of Fiocchi, set-up for each new batch. That seems to have solved the problem.
This ^^^^

Reloading mixed 9mm cases was giving a difference of up to 9-10 thou with that die. Setting it for each different head stamp is the answer.
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  #14  
Old 05-04-2010, 01:12 AM
1911Collector 1911Collector is offline
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Quote:
Originally Posted by sophijo View Post
I had same issue with mixed cases and separated them out. Now I'll load a batch of Winchester or a batch of Fiocchi, set-up for each new batch. That seems to have solved the problem.
Sophijo, you sir are correct that took care of the issue. I had a batch of Speer 9mm Nickel cases and loaded a batch of 100. Most were dead-on w/ dialed-in seating depth according to my caliper. Some were +/- .001 which is hard to ask for more in my book.

Thanks for the confirmation!

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Last edited by 1911Collector; 05-04-2010 at 02:08 AM.
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