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
Case prep - 300wm
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="backcountrymeats" data-source="post: 1627872" data-attributes="member: 105765"><p>^^^^ great advice ^^^^</p><p></p><p>I run ADG brass in my custom .300wm also. Very consistent brass. Belted brass already has a disadvantage right off the gate with its short shoulder lengths and needing to grow excessively which can create many many issues if not done and maintained correctly. ADG brass is SOLID. My recommendation which is what I do as well as MANY MANY other .300wm shooters is:</p><p>- Run brass through expander Mandrel to open up necks to .306"-.307".</p><p>- Take ALL measurements of your brass and log them into your reloading book (trust me you will refer back to these measurements all the time)</p><p>- chamfer and debur necks</p><p>- charge and seat bullet</p><p>Go have fun fireforming all brass!</p><p></p><p>I neck size only for the first 3 firings allowing the brass to fully fill the chamber. After the 3rd firing I FL size at every firing from then on bumping the shoulders back .002". My ADG brass grew .019" on first firing, .003" on the second firing, and third .0005"-.001" on the 3rd firing.</p><p></p><p>Don't start load development until you have 1x Brass! Your velocities, nodes, and groups will be WAY off from one another from new brass to once fired due to the case growing so much initially.</p><p></p><p>Good luck with your new rifle</p><p>Backcountrymeats</p></blockquote><p></p>
[QUOTE="backcountrymeats, post: 1627872, member: 105765"] ^^^^ great advice ^^^^ I run ADG brass in my custom .300wm also. Very consistent brass. Belted brass already has a disadvantage right off the gate with its short shoulder lengths and needing to grow excessively which can create many many issues if not done and maintained correctly. ADG brass is SOLID. My recommendation which is what I do as well as MANY MANY other .300wm shooters is: - Run brass through expander Mandrel to open up necks to .306”-.307”. - Take ALL measurements of your brass and log them into your reloading book (trust me you will refer back to these measurements all the time) - chamfer and debur necks - charge and seat bullet Go have fun fireforming all brass! I neck size only for the first 3 firings allowing the brass to fully fill the chamber. After the 3rd firing I FL size at every firing from then on bumping the shoulders back .002”. My ADG brass grew .019” on first firing, .003” on the second firing, and third .0005”-.001” on the 3rd firing. Don’t start load development until you have 1x Brass! Your velocities, nodes, and groups will be WAY off from one another from new brass to once fired due to the case growing so much initially. Good luck with your new rifle Backcountrymeats [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Case prep - 300wm
Top