headspace gauge for .223 Wylde chamber
- Thread starter jmm03
- Start date
dstoenner
Silver $$ Contributor
I don’t have any prints to verify that the 556 headspace is the same as the 223. But I think it is. The 556 chamber is cut a little bigger in circumference and there is also a field gauge that is longer than the NO-GO gauge.
I know that is not definitive answer. If I had the choice of 223 or 556 go gauge I would use the former to remove all doubt
David
If you're checking an existing chamber, what type of rifle is at issue? If it's an AR, my first preference would be a 5.56 headspace gauge. Bolt gun, I'd go with a .223. It really does amount to a distinction without a practical difference, though. If you have one or the other on hand, use it. Everything subsequent comes down to proper adjustment of your sizing die.
If you have neither, I'd go with a Forster or a Clymer and select based on the rifle type. One man's opinion.
Merry Christmas.
dstoenner
Silver $$ Contributor
So I did some investigation of the original question. The military 556 go gauge is .0006 longer than the civilian 223 go gauge. Yes that is .6 thousands longer.
While it is different I do not believe you will in practical purposes find any difference with one or the other
David
While it is different I do not believe you will in practical purposes find any difference with one or the other
David
David, that's 6 ten thousandths. Six thousandths would be .006. And I agree with you - the difference is not a practical one.
https://www.midwayusa.com/product/366434/ptg-headspace-no-go-gauge-223-remington-wylde
1.4625" with Hornady Headspace 330 bushing
1.4625" with Hornady Headspace 330 bushing
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I prefer to use a go-gauge, then add a layer of masking tape to the head thus turning it into a no-go gauge.
The masking tape I use measures 0.004" thick so it elongates the go gauge to no-go gauge length.
In reality one has to measure the go gauge before and after applying the masking/painters tape.
I understand the way I do it is OK on bolt guns and questionable on semi-autos, but I've used this method on 2 different M1A's and got positive feel of the bolt not closing/locking.
Each their own and it's all about whatever makes gives you confidence.
The masking tape I use measures 0.004" thick so it elongates the go gauge to no-go gauge length.
In reality one has to measure the go gauge before and after applying the masking/painters tape.
I understand the way I do it is OK on bolt guns and questionable on semi-autos, but I've used this method on 2 different M1A's and got positive feel of the bolt not closing/locking.
Each their own and it's all about whatever makes gives you confidence.
My mistake, David. I missed the decimal point in your post. That's what I get for not using my reading glasses!
Apologies.
If you would like an actual 223 Wylde go gauge, I have a PTG one that is still new, never used. Bought it to keep on hand just in case I changed barrels on a 223 Wylde. PM me if you'd be interested in it.
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