Dummy Rounds

a 1/4" of space to the case neck and an 1/8". Seems like just using a bullet could make that kind of hard to measure.
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Seems like you need a way to mark the bullet somehow. Maybe just cut the case in half so everyone can see it is just a gauge. No more primer to deal with either.
 
Let give some background into why I want to do this, maybe someone has a better idea. I love milsurps! When I go to local shows and whatnot I always thought it would nice to be able to do a poor man's muzzle erosion check (you know, putting a round point first into the barrel and seeing where it stops) on some of the old rifles I come across.
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Some barrels require counterboring to remove the muzzle wear. After that it becomes a choice of shortening the barrel and re-crowning or leaving the rifle with the counterbored hole. The hole can be 1 inch + deep.

It is believed the muzzle wear is caused by abuse when the cleaning rod is run in and out. The hot high metal cutting gas escapes behind the bullet, there is little I can do about the hot high pressure metal cutting gas escaping but I did change the way I clean barrels.

I made a barrel cleaning system that all but eliminates muzzle wear. While I was at it I 'fixed it' it so it was impossible to lock up in the barrel. I was impressed at how clean the system cleaned barrels. I dug most of the material I use out of a dumpster.

I have no ideal what you will accept when it comes to tapper but if someone could make up their mind what is acceptable a go/no go gage could be make and there are different ways to make a tapped gage.

F. Guffey
 
You can mark bullets just by opening your caliper to a desired diameter and setting the bullet nose down between the jaws and turning it to get a mark. Mr. Guffey's suggestion of a tapered gauge is a good one. Buy a 3" #6 taper pin to cover your whole range of bore diameters (it tapers from 0.3410" down to 0.2786") except the 6.5 mm. You will need a #5 for that. It will drop about 0.0208" for every 0.001" wider the hole ithat you are gauging is. You can put magic marker down it side and use a height gauge or a caliper to mark line the graduations in the ink, or you can put fresh magic marker on it each time you check a muzzle and measure the pin diameter at the mark each time.

I have removed all the posts that went Off-Topic. I will establish a sticky thread on headspace and future comments on the topic can all go there. It's been beaten to death on a regular basis, so it's time for a permanent place for this information.
 
Not saying that this is a good idea for other reloaders or not, but when I build a dummy round I always insert a used primer in backwards so that I know that it is not a live round.
 
Regarding my offer I made you ten including eight in a GI enblock clip. They are on the way USPS so look for them on Saturday. I also sent you a PM.

Ron
 
My dummy rounds have no primers, and of course no powder...... Without the primer, you can tell immediately its a dummy, I would never want to mistake a live round for a dummy load, that would be a disaster....
 
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