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
Rifles, Bullets, Barrels & Ballistics
Chamber Specs - Optimization
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="Alex Wheeler" data-source="post: 2061321" data-attributes="member: 101859"><p>Nope, my 6BRA reamer has a .244" freebore diameter on it and it has broken a lot of records and won national matches in 600 and 1000 yard Benchrest. Most guys run .002-.003" neck clearance.</p><p></p><p>There may still be some guys running as tight as .001" but the trend has been to give more clearance as theres no loss in accuracy and the guns arent as finicky. When you get to tight on either of those places you get picky rifles that spit shots. The freebore diameter on the 6.5 PRC is too tight. If you get a reamer that actually has a .2645" diameter on it, after a handful of chambers you will be cutting a .2643" throat and you will see scratches all around the bullet, pressure and fliers follow. Most reamers do not measure exactly what the print says. Depending on who made the reamer, Id bet most of them are closer the high end of the spec. In the freebore the tolerance is minus zero, plus .0005". The bottom line is you do not gain accuracy by going as tight as you can but you do risk hurting it. So the trend is to stay away from that.</p></blockquote><p></p>
[QUOTE="Alex Wheeler, post: 2061321, member: 101859"] Nope, my 6BRA reamer has a .244" freebore diameter on it and it has broken a lot of records and won national matches in 600 and 1000 yard Benchrest. Most guys run .002-.003" neck clearance. There may still be some guys running as tight as .001" but the trend has been to give more clearance as theres no loss in accuracy and the guns arent as finicky. When you get to tight on either of those places you get picky rifles that spit shots. The freebore diameter on the 6.5 PRC is too tight. If you get a reamer that actually has a .2645" diameter on it, after a handful of chambers you will be cutting a .2643" throat and you will see scratches all around the bullet, pressure and fliers follow. Most reamers do not measure exactly what the print says. Depending on who made the reamer, Id bet most of them are closer the high end of the spec. In the freebore the tolerance is minus zero, plus .0005". The bottom line is you do not gain accuracy by going as tight as you can but you do risk hurting it. So the trend is to stay away from that. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Chamber Specs - Optimization
Top