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
Reloading
First case head separation
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="VinceMule" data-source="post: 2909767" data-attributes="member: 122164"><p>The Term, "Size to Fit The Chamer" is a shore enough can of worms. Headspace length is one issue, dia of the reamer used, dia of the Chamber, and dia of the die sizes to at the web is of critical importance.</p><p></p><p>Also, some gunsmiths use techniques that cut to reamer size while some do not.</p><p></p><p>Factory chambers are usually generous in web dimensions, set some of the brass to headspace length in these chambers and you still will not be able to close the bolt easily due the web dia not being reduced enough, dies can vary greatly, not to mention brass spring back.</p><p></p><p>If you take a 7 mag and reduce the pressure to where you can neck size for 5 firings, you may as well be shooting a 24" 280 Remington where you can shoot the 160g at 2930 with IMR 7828, Federal 210, a load right out of the Nosler Manual #3, not meant for pumps and semi-autos.</p><p></p><p>Practically ALL F-class shooters and Benchrest shooters are full-length sizing at this time due to accuracy nodes at the top end of the pressure curve.</p><p></p><p>Today, custom reamers are being made by gunsmiths to get rid of the "bolt click" due to a mis match between PRS brass and current Production die dimensions. The custom gunsmiths are ordering reamers that are larger in the web.</p><p></p><p>This is redundant, but worth saying: Shooters are slowly catching on to the two dimensions that are critical on a chamber:</p><p></p><p>A. Headspace length</p><p></p><p>B. Web dia</p><p></p><p>European brass complicates all of this mess as European CIP standards produce larger web dia brass that often do not match SAAMI chambers nor SAAMI spec production Dies.</p><p><strong><span style="color: rgb(184, 49, 47)"></span></strong></p><p><strong><span style="color: rgb(184, 49, 47)">Magnum is EXACTLY right in that case head separations are due to the reloader pushing the shoulder back too far</span></strong>, but everyone can afford a $450 set of dies that match to the chamber reamer used or custom-designed off of fire-formed brass! Those of us who have to use production dies have to live with just throwing brass away as needed due to pushing the shoulder back too far to reduce the web dia. </p><p></p><p>We are all on a learning curve, and hopefully, we never quit learning, especially me.</p></blockquote><p></p>
[QUOTE="VinceMule, post: 2909767, member: 122164"] The Term, "Size to Fit The Chamer" is a shore enough can of worms. Headspace length is one issue, dia of the reamer used, dia of the Chamber, and dia of the die sizes to at the web is of critical importance. Also, some gunsmiths use techniques that cut to reamer size while some do not. Factory chambers are usually generous in web dimensions, set some of the brass to headspace length in these chambers and you still will not be able to close the bolt easily due the web dia not being reduced enough, dies can vary greatly, not to mention brass spring back. If you take a 7 mag and reduce the pressure to where you can neck size for 5 firings, you may as well be shooting a 24" 280 Remington where you can shoot the 160g at 2930 with IMR 7828, Federal 210, a load right out of the Nosler Manual #3, not meant for pumps and semi-autos. Practically ALL F-class shooters and Benchrest shooters are full-length sizing at this time due to accuracy nodes at the top end of the pressure curve. Today, custom reamers are being made by gunsmiths to get rid of the "bolt click" due to a mis match between PRS brass and current Production die dimensions. The custom gunsmiths are ordering reamers that are larger in the web. This is redundant, but worth saying: Shooters are slowly catching on to the two dimensions that are critical on a chamber: A. Headspace length B. Web dia European brass complicates all of this mess as European CIP standards produce larger web dia brass that often do not match SAAMI chambers nor SAAMI spec production Dies. [B][COLOR=rgb(184, 49, 47)] Magnum is EXACTLY right in that case head separations are due to the reloader pushing the shoulder back too far[/COLOR][/B], but everyone can afford a $450 set of dies that match to the chamber reamer used or custom-designed off of fire-formed brass! Those of us who have to use production dies have to live with just throwing brass away as needed due to pushing the shoulder back too far to reduce the web dia. We are all on a learning curve, and hopefully, we never quit learning, especially me. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
First case head separation
Top