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Headspace guage

 
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  #1  
Old 01-20-2011, 10:41 PM
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Headspace guage

I have the Hornady headspace kit and looking for help on how to use it
Never used one before and wondering if anyone else uses it and can provide some how-to's.

Thanks
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Old 01-20-2011, 10:59 PM
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Re: Headspace guage

Quote:
Originally Posted by 340Shooter View Post
I have the Hornady headspace kit and looking for help on how to use it
Never used one before and wondering if anyone else uses it and can provide some how-to's.

Thanks
Basically you will use the tool to measure the difference in a case that has been fired in your gun but not sized to a case that has been sized. You will find that the case that has been sized is smaller than the fired only case. So now you can adust your resizing die so that it is only moving the shoulder of a fired case back by about 2 thousandths
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Old 01-21-2011, 05:24 PM
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Re: Headspace guage

That's all there is too it. get the propper collar to fit the shoulder of the brass you are measuring. It touches the datum line on the shoulder. With your calipers, you measure from the head of the brass, to that datum line.

I like to measure unfired brass, 1x fired brass and 2x fired brass (all unsized) to see wher the shoulder ends up. It depends on how tight your chamber is. As stated, do a partial full length resize, bumping your shoulder back about .002". I like to do this starting with 2x fired brass. I feel that it gives a better blueprint of your chamber. The 1x fired brass gets neck sized only.
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Old 01-21-2011, 05:29 PM
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Re: Headspace guage

BTW, you can even make a collar up, but simply finding some pistol brass that fits over your rifle brass and touches at or close to the datum line. Just put your calipers on the head of the upside down pistol brass and on the head of the rifle brass that you are measuring.
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Old 01-21-2011, 10:12 PM
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Re: Headspace guage

Thanks for the help. I have some Weatherby calibers, and not sure if they can be measured the same way with the double radius shoulder.
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  #6  
Old 01-22-2011, 07:18 AM
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Re: Headspace guage

Good advice.


Quote:
Originally Posted by sakoluvr View Post
That's all there is too it. get the propper collar to fit the shoulder of the brass you are measuring. It touches the datum line on the shoulder. With your calipers, you measure from the head of the brass, to that datum line.

I like to measure unfired brass, 1x fired brass and 2x fired brass (all unsized) to see wher the shoulder ends up. It depends on how tight your chamber is. As stated, do a partial full length resize, bumping your shoulder back about .002". I like to do this starting with 2x fired brass. I feel that it gives a better blueprint of your chamber. The 1x fired brass gets neck sized only.
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  #7  
Old 01-22-2011, 11:35 AM
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Re: Headspace guage

Quote:
Originally Posted by 340Shooter View Post
Thanks for the help. I have some Weatherby calibers, and not sure if they can be measured the same way with the double radius shoulder.
I've made a few sleeves to check Weatherby cases in the past. The idea is to draw up the case head in a cad program, and then find the flat part of the shoulder between the radiuses. That will give you the correct I.D. of the sleeve. Then all you need to do is turn one out of aluminum or brass that will clear the total length of the neck plus still seat on the shoulder. What caliber are you shooting?
gary
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