Most Inexpensive Concentricity Gauge Ever! (4K)

The need for concentricity gauges is debateable, so it’s not something most reloaders want to spend a lot of time on.
But measuring the concentricity of your loads can answer some interesting questions at times so, if you can make one quite inexpensively, why not? This video, recorded in a design-as-you-go style, shows you how, using items you can find around your home. Will it work? You’ll see at the end.

The basic run-out gauge unit shown in this video can be found at:
TRN affiliate link (Amazon US):

00:00 – Why I need a run-out gauge
02:01 – The start of a solution
05:50 – The challenge of making a cartridge cradle
06:40 – The “Aha!” moment
10:35 – Making the cradle
11:39 – The need for a bumper
15:47 – Putting it all together

Would you like to support this channel’s on-going work? “Buy Me A Coffee” using the following link:

Your support is greatly appreciated!

By the way, did you enjoy the music in this video? Subscribe to Endemic Sound to get royalty-free music for use in your own content. It is what we use and, at the same time, you can help support this channel by using the following link when signing up for their service:

DISCLAIMER: My videos are strictly for documentary, educational, and entertainment purposes only. Imitation or the use of any acts depicted in my videos is solely AT YOUR OWN RISK. All work on firearms should be carried out by a licensed individual and all state, provincial and federal rules apply to such. I (including YouTube) will not be held liable for any injury to yourself or damage to your firearms resulting from attempting anything shown in any of my videos. I do not endorse any specific product and this video is not an attempt to sell you a good or service. I am not a gun store and DO NOT sell or deal in firearms. Such a practice is heavily regulated and subject to applicable laws. I DO NOT sell parts, magazines, or firearms. These videos are free to watch and if anyone attempts to charge for this video notify me immediately. By viewing or flagging this video you are acknowledging the above.

Fair Use: In the rare instance I include someone else’s footage, that is covered in Fair Use for Documentary and Educational purposes with the intention of driving commentary and allowing freedom of speech.


Disclosure of Material Connection: Some of the links in the post above are “affiliate links.” This means if you click on the link and purchase the item, the post author and/or The Reloaders Network will receive an affiliate commission. This is being disclosed in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”

Share this:
Notify of
Inline Feedbacks
View all comments