Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Headspace Explained
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="J E Custom" data-source="post: 1846486" data-attributes="member: 2736"><p>The go gauge is to set the head space to SAMMI minimum for Sammi chambers and commercial ammo use. you can actually set head space tighter that the go gauge for wildcats that require fire forming, but I would recommend the go gauge plus .001 or .002 shims added. this would allow you to shoot factory ammo and then if you wanted to load for the rifle the head space can be adjusted for the head space you want or need with the loading dies. </p><p></p><p>The way I set head space is .0005 to .0015 depending on the use and if the person reloads.</p><p>For gas operated firearms I use .0015 to .003. for self defense, I will go to .004 (The bolt may close on the no go gauge) at this head space but again adding a .001 thousandths shim to the no go gauge should assure that you don't have .005 and be in a range that is not recommended. </p><p></p><p>I don't use no go gauges simply because I wan't to know exactly what head space I have and the shimming method gives me exact dimensions instead of a range somewhere between .000 to .004</p><p></p><p>This is done by setting the head space with the go gauge to where it will close with just the weight of the bolt or slight finger pressure. Then to reach the exact head space I'm trying for, I add the appropriate shim to the back of the go gauge. normally if you develop the "Feel", the slight feel as the bolt closes is near .000 to .0005 so if I add a .001 shim to the back of the go gauge, it will be .0015. the way you can check this is to insert a .002 shim in place of the .001 and the bolt doesn't want to close. (Don't force any chamber gauge closed). just to be sure you can try your no go gauge and it shouldn't close at all.</p><p></p><p>Field gauges are designed to warn you that the chamber is loose and not recommend for use (They are normally .006 to .008)</p><p></p><p>You can buy brass shim stock in small rolls in dimensions from .001 up and I have a supply up to .020. that comes in handy for other uses.</p><p></p><p>Hope this helps</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1846486, member: 2736"] The go gauge is to set the head space to SAMMI minimum for Sammi chambers and commercial ammo use. you can actually set head space tighter that the go gauge for wildcats that require fire forming, but I would recommend the go gauge plus .001 or .002 shims added. this would allow you to shoot factory ammo and then if you wanted to load for the rifle the head space can be adjusted for the head space you want or need with the loading dies. The way I set head space is .0005 to .0015 depending on the use and if the person reloads. For gas operated firearms I use .0015 to .003. for self defense, I will go to .004 (The bolt may close on the no go gauge) at this head space but again adding a .001 thousandths shim to the no go gauge should assure that you don't have .005 and be in a range that is not recommended. I don't use no go gauges simply because I wan't to know exactly what head space I have and the shimming method gives me exact dimensions instead of a range somewhere between .000 to .004 This is done by setting the head space with the go gauge to where it will close with just the weight of the bolt or slight finger pressure. Then to reach the exact head space I'm trying for, I add the appropriate shim to the back of the go gauge. normally if you develop the "Feel", the slight feel as the bolt closes is near .000 to .0005 so if I add a .001 shim to the back of the go gauge, it will be .0015. the way you can check this is to insert a .002 shim in place of the .001 and the bolt doesn't want to close. (Don't force any chamber gauge closed). just to be sure you can try your no go gauge and it shouldn't close at all. Field gauges are designed to warn you that the chamber is loose and not recommend for use (They are normally .006 to .008) You can buy brass shim stock in small rolls in dimensions from .001 up and I have a supply up to .020. that comes in handy for other uses. Hope this helps J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Headspace Explained
Top