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
Barrel flute timing?
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: 859074" data-attributes="member: 2736"><p>If you look at the barrel makers acceptance criteria he will have an end to end tolerance.</p><p></p><p>Most premium barrels that I use are guaranteed to be uniform dimensionally to within .0001</p><p>and .0002 for Chrome Molly barrels. contours can be off on the outside by .000 to .005 (Industry</p><p>standard acceptance)from end to end. Any more than this should be rejected and sent back to the barrel maker.</p><p></p><p>I have had premium barrels go as high as .014 end to end and sent them back with no problems.</p><p></p><p>Some factory barrels have had to be re-contoured to true them up. most are bore straightened </p><p>after all work is done leaving the outside with run out because it was contoured while the bore </p><p>was still as drilled and rifled. </p><p></p><p>My preferred barrel makers barrels are normally .0000 to .0015 max.</p><p></p><p>I have heard of this Barrel orientation thing because of barrels not being straight, but have never </p><p>kept one that needed any special orientation due to being crooked/bent.</p><p></p><p>So , If the barrel is straight and true to the bore , there is no special requirement for orientation.</p><p></p><p>Some barrel manufacturers tolerances are more generous and may go up as high as .005 to .007</p><p>and I just prefer not to use them. </p><p></p><p>In My opinion : If you have to do something special to a barrel because of it's straightness it needs </p><p>to be rejected and sent back.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 859074, member: 2736"] If you look at the barrel makers acceptance criteria he will have an end to end tolerance. Most premium barrels that I use are guaranteed to be uniform dimensionally to within .0001 and .0002 for Chrome Molly barrels. contours can be off on the outside by .000 to .005 (Industry standard acceptance)from end to end. Any more than this should be rejected and sent back to the barrel maker. I have had premium barrels go as high as .014 end to end and sent them back with no problems. Some factory barrels have had to be re-contoured to true them up. most are bore straightened after all work is done leaving the outside with run out because it was contoured while the bore was still as drilled and rifled. My preferred barrel makers barrels are normally .0000 to .0015 max. I have heard of this Barrel orientation thing because of barrels not being straight, but have never kept one that needed any special orientation due to being crooked/bent. So , If the barrel is straight and true to the bore , there is no special requirement for orientation. Some barrel manufacturers tolerances are more generous and may go up as high as .005 to .007 and I just prefer not to use them. In My opinion : If you have to do something special to a barrel because of it's straightness it needs to be rejected and sent back. J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Barrel flute timing?
Top