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
How important is blueprinting an action
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: 1839730" data-attributes="member: 2736"><p>Good question !</p><p></p><p>I have seen the same thing but the percentages of good shooting factory is not very good compared to poorly shooting with a few Oks thrown in. </p><p></p><p>I once re barreled a Savage that shot very good and in the process I trued everything up. The first thing I do in this process is check the parts for accuracy so i know what I need to do. "Shocker" this thing was so bad I began to question if blueprinting was even necessary if this thing would shoot.</p><p></p><p>As I dimension'ed every part, I was really astounded that it could even shoot a 5'' group at 100 yards, much less a 1/2 MOA group. so I decided to index/orient each component like it was put together. And the question was answered. </p><p></p><p>The apposing parts fell amazingly in the best position to cancel out the errors and become relatively true to the bore centerline. the recoil lug had a 0.004 thickness difference on one side and the action had a 0.0045 on the opposite side so the total error of this one assembly was 0.0085 but the assembled error was 0.0005. the bolt lugs had the same problem but canceled the error out simply by there location.</p><p></p><p>Since that time I have found many actions that had less errors dimension ally but they didn't cancel each other out, and a few have had some that did in some areas and did not in other areas.</p><p> So to eliminate the chance ether way, I blue print every action to verify it's accuracy. and in a few actions I find very little/few issues.</p><p></p><p>The fact that a rifle shoots well doesn't mean that it is true, just that the errors were in the right place to effect the accuracy very little.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1839730, member: 2736"] Good question ! I have seen the same thing but the percentages of good shooting factory is not very good compared to poorly shooting with a few Oks thrown in. I once re barreled a Savage that shot very good and in the process I trued everything up. The first thing I do in this process is check the parts for accuracy so i know what I need to do. "Shocker" this thing was so bad I began to question if blueprinting was even necessary if this thing would shoot. As I dimension'ed every part, I was really astounded that it could even shoot a 5'' group at 100 yards, much less a 1/2 MOA group. so I decided to index/orient each component like it was put together. And the question was answered. The apposing parts fell amazingly in the best position to cancel out the errors and become relatively true to the bore centerline. the recoil lug had a 0.004 thickness difference on one side and the action had a 0.0045 on the opposite side so the total error of this one assembly was 0.0085 but the assembled error was 0.0005. the bolt lugs had the same problem but canceled the error out simply by there location. Since that time I have found many actions that had less errors dimension ally but they didn't cancel each other out, and a few have had some that did in some areas and did not in other areas. So to eliminate the chance ether way, I blue print every action to verify it's accuracy. and in a few actions I find very little/few issues. The fact that a rifle shoots well doesn't mean that it is true, just that the errors were in the right place to effect the accuracy very little. J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
How important is blueprinting an action
Top