Gunsmithing .308 headspace gauge in a .243?

[LoneWolfUSMC]

Simple question before I go ordering more gauges....

Can you effectively use a .308win Go/NoGo gauge in a .243win?

They both have 40* Shoulders that start at 1.5598 according to the diagrams I am looking at. It seems like this would make the gauge contact the shoulder in the same location on the .243 as on my .308

Am I missing anything?

 

[wtopace]

Re: .308 headspace gauge in a .243?

You aren't missing anything, they are the same gauge. .308 works for .243, .260 and I believe a few others as well.

 

[Ratbert]

Re: .308 headspace gauge in a .243?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wtopace</div><div class="ubbcode-body">You aren't missing anything, they are the same gauge. .308 works for .243, .260 and I believe a few others as well.</div></div>

Indeed.

 

[E. Bryant]

Re: .308 headspace gauge in a .243?

Yep, same gauge for both.

 

[Bobt440]

Re: .308 headspace gauge in a .243?

they are right about using the same guages. but they dont have 40* shoulders.

unless they are both Ackley improved

 

[McLarenross]

Re: .308 headspace gauge in a .243?

Im pretty sure he meant 20*

 

[skog]

Re: .308 headspace gauge in a .243?

243 win, 260 rem, 7-08, 308, 338 federal, 358 win all use the same headspace gauge

 

[LoneWolfUSMC]

Re: .308 headspace gauge in a .243?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: McLarenRoss</div><div class="ubbcode-body">Im pretty sure he meant 20* </div></div>

Yes. I looked at the print quickly, and it notes the angle as 40, but it was the sum of both sides.

Good thing too because I have everything I need to swap the barrel on the AE except. 243 gauges. However I do have my. 308 gauges.

 

[gunnergirl81]

Re: .308 headspace gauge in a .243?

http://www.pacifictoolandgauge.com/pdf/headspace_gauge_interchangeabilty_chart_12_15_08.pdf

Print it up and keep it with your gauges. We've got a copy in the tackle box we store our in.

 

[LoneWolfUSMC]

Re: .308 headspace gauge in a .243?

Thanks