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Need help with COAL

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Old 12-20-2013, 04:07 PM
Junior Member
Join Date: Nov 2012
Posts: 21
Need help with COAL

I recently purchased a savage 12 LRP in 260 rem. I've got 200 140g VLD, 8 pounds of H4350, and 100 lapua cases. I'm loading with a Forrester coax. I'm new to reloading, but have done a lot of homework. My question is What is the most reliable method of determining COAL, or maybe better phrased, how can I determine seating depth to kiss the lands.

Thanks in advance
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Old 12-20-2013, 04:55 PM
Platinum Member
Join Date: Oct 2007
Location: Mountians of SW NC, near Asheville
Posts: 1,596
Re: Need help with COAL

You're still a noob, you have LOT to learn before any "kissing the lands" will mean anything at all to you and it does open the door to the hazards of a pinched bullet. Stick with book oal until you know what you're doing.
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Old 12-20-2013, 05:11 PM
Junior Member
Join Date: Nov 2012
Posts: 21
Re: Need help with COAL

That will help a lot with the VLD's. Thanks for nothing.
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Old 12-20-2013, 08:22 PM
Junior Member
Join Date: Jan 2012
Posts: 3
Re: Need help with COAL

hey check out this website for sinclair products.

I like this tool and you will need to watch their video. It is very helpful.

The main goal is safety. The measurement COAL is very deceiving due to the curvature of the bullets we use in rifles. Since we can not climb in the chamber and measure from the bolt face to the point of the rifling that touches a curved surface of the bullet, we must use a COMPARATIVE measurement.
This can be done with the above instrument, with a Hornady OAL gauge, a RCBS CASE MICROMETER ( they don't advertise a .260) or the old fashioned way of using a bullet just seated into the neck of a resized case.
All of the above will need to be compared to SAAMI specs and carefully approached.

Hopefully this will point you in the right direction to get more info. Buy a reloading manual and read it and then you can get a more experienced reloader to check you out in person with measuring the length to the rifling.
I like to start with a box of factory bullets and use a bullet comparator to measure the ogive and then keep ten to compare to your reloads. I usually shoot the other ten factory loads and then measure the used cases to determine the headspace and use them to set up my full length resizer.

All of this will require some practice and supervision. With a little help you can do it.
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Old 12-21-2013, 08:25 AM
Platinum Member
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,264
Re: Need help with COAL

farpiece, There are many tools out there & I have a bunch myself. But soft seating with a split neck case is simple enough to begin. This, as described here:

Larry's indicator works good, I use it for case shoulder bumping. For cartridge base to ogive(CBTO), I measure & log seating using a Sinclair nut & calipers:
Has always worked good for me.

My favorite tool for determining Max COAL is called an R-P tool. I don't know that they're easy to find anymore. But one could be made with the best in cleaning rod and cleaning rod stops. WOODS has posted info about this setup with pics.
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