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
What am I looking at??
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: 1494276" data-attributes="member: 2736"><p>What you are looking at is a very poor Quality barrel !!!</p><p>The annular marks are from the drilling process. It was bored to large for the reaming (If reamed) to remove it. Reaming is a very important part of the rifling process and is done to true up the drilled hole and size it for rifling.</p><p></p><p>It also looks like the rifling process was not proper to get the annular drill marks off the top of the lands. The top of the lands should be smooth and free of any machine marks. in addition to all of the problems with the bore, The billet had some problems as well that caused Delamination. (the missing square chunks are not indicative of piting) this normally occurs when a sufficient amount of the billet is not removed before forming/rolling and the billet still has some slag</p><p>or defects in it and when rolled they leave cold joints/lamination's. </p><p></p><p>Attached is a link to a barrel makers video inspection and what the bore should look like when finished. that may give you an idea of what a bore should look like if done correctly.</p><p> <a href="http://riflebarrels.com/video-inspection-machine/" target="_blank">http://riflebarrels.com/video-inspection-machine/</a></p><p></p><p>This looks like a buttoned rifle barrel Because of the lack of machine marks on the edges of the lands where the barrel material is forged into shape and size, and with the improper bore size there was not enough material to displace the defects. This can also occur in a cut rifled barrel if the proper process is not used. I have a brand new cut rifled barrel that has some major problems and has been rejected for use.</p><p></p><p>Chances are that you cant see any defects with a bore lite, but when you look with a good bore scope, what appears to be fine, suddenly</p><p>is shockingly bad.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1494276, member: 2736"] What you are looking at is a very poor Quality barrel !!! The annular marks are from the drilling process. It was bored to large for the reaming (If reamed) to remove it. Reaming is a very important part of the rifling process and is done to true up the drilled hole and size it for rifling. It also looks like the rifling process was not proper to get the annular drill marks off the top of the lands. The top of the lands should be smooth and free of any machine marks. in addition to all of the problems with the bore, The billet had some problems as well that caused Delamination. (the missing square chunks are not indicative of piting) this normally occurs when a sufficient amount of the billet is not removed before forming/rolling and the billet still has some slag or defects in it and when rolled they leave cold joints/lamination's. Attached is a link to a barrel makers video inspection and what the bore should look like when finished. that may give you an idea of what a bore should look like if done correctly. [URL]http://riflebarrels.com/video-inspection-machine/[/URL] This looks like a buttoned rifle barrel Because of the lack of machine marks on the edges of the lands where the barrel material is forged into shape and size, and with the improper bore size there was not enough material to displace the defects. This can also occur in a cut rifled barrel if the proper process is not used. I have a brand new cut rifled barrel that has some major problems and has been rejected for use. Chances are that you cant see any defects with a bore lite, but when you look with a good bore scope, what appears to be fine, suddenly is shockingly bad. J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
What am I looking at??
Top