How (and why) to Measure COAL and CBTO; an EXTREME RELOADING Special Edition

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Case length, cartridge overall length, and cartridge base to ogive are all important measurements during the case prep and reloading process. Learn how to improve your measuring technique to increase precision and the consistency of your ammo.
Timeline:
00:00 - Intro
00:53 - COAL
03:17 - CBTO
11:18 - Using an anvil base
13:50 - Wrap up

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Опубликовано:

13 июл 2024

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Комментарии : 10

@Sybreed117 3 месяца назад

Great information, delivered very well in an easy to understand presentation. Appriciate the effort you put into the video. Thank you.

@sdkweber 3 месяца назад

You are welcome. I appreciate it and thank you for watching and taking the time to post.

@FSU1HEMI1 7 месяцев назад

You could just superglue a shell holder to your anvil. I like the idea of hornady selling the anvil already setup that way

@sdkweber 7 месяцев назад

That's funny. Thanks for posting.

@madman432000 2 месяца назад

I wonder if a shallow cup shape that is the right size for different case heads would work in place of that anvil. Might eliminate some of the spinning the cartridge to square it up. But then I'm not measuring every cartridge coming off the press, first 3 or 4 and they are consistent then one periodically maybe every 20 as spot checks.

@sdkweber 2 месяца назад

I have been thinking about a better way also. I talked to the folks at 21st Century reloading and we discussed an anvil that is essentially a case holder also. That may eliminate all wobble and make the measurement as exact as possible.

@Obelisk57 2 месяца назад

I have been using the .22 cal insert to measure the .308 bullet seating depth. I don't understand if all we are doing is to find max COAL so I can set the die to seat .020 less, why would it matter where on the bullet we are taking measurements from as long as it's not the tip? It's a relative measurement anyway, so why must it be taken at the Ogive and not somewhere above it. Can you explain? Thanks.

@sdkweber 2 месяца назад

If you are really trying to seat the bullet so it is just off the lands, using the correct insert is important. Each insert is designed to impact the bullet at the ogive. That point on the ogive is the same point that will first impact the lands of the rifling. Alternatively, if you want to get a good measurement of cartridge length, the approach you are using will work just fine. Just be sure you are always measuring using the same insert. I hope this helps.