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
Primer Cratering Question
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=".280Rem" data-source="post: 210606" data-attributes="member: 11140"><p>You've gotten some good answers here. Primers vary in hardness. Cratering/flattening of primers is one of the least reliable methods for indicating excess pressures. </p><p> </p><p>As for your loading, and "staying under max". I know you've read the books. You've read "never exceed max loads published". Etc, etc. Each gun is a law unto itself. Brass capacity differs brand to brand and can affect pressure. Primer "hotness" varies greatly brand to brand and can affect pressure. 95grs of Retumbo with a 180 bullet over a CCI Mag Rifle primer, wont be the same pressure as the same load over a Winchester Mag Rifle primer. You should own a chronograph to reload. It tells you much! It's a great tool IF you know how to apply the information it gives you to your loads and the data. I've seen handload that were, like yours, under book max, that were producing very high velocity, and obvious signs of pressure. However, the FIRST sign of pressure, assuming your loading techniques are sound, will almost always be velocity. If you're using proper powders for the application, you can almost always get the published velocity of most load whether it be 2 grains under the "book max" or 2 grains over. If you're running what the manual says is max velocity but you're 3 grains under the max powder charge...you can pretty well rest assured you've found YOUR GUN'S max. Don't think that because you're powder charge weights are under some arbitrary number in a manual that you're "under max".</p></blockquote><p></p>
[QUOTE=".280Rem, post: 210606, member: 11140"] You've gotten some good answers here. Primers vary in hardness. Cratering/flattening of primers is one of the least reliable methods for indicating excess pressures. As for your loading, and "staying under max". I know you've read the books. You've read "never exceed max loads published". Etc, etc. Each gun is a law unto itself. Brass capacity differs brand to brand and can affect pressure. Primer "hotness" varies greatly brand to brand and can affect pressure. 95grs of Retumbo with a 180 bullet over a CCI Mag Rifle primer, wont be the same pressure as the same load over a Winchester Mag Rifle primer. You should own a chronograph to reload. It tells you much! It's a great tool IF you know how to apply the information it gives you to your loads and the data. I've seen handload that were, like yours, under book max, that were producing very high velocity, and obvious signs of pressure. However, the FIRST sign of pressure, assuming your loading techniques are sound, will almost always be velocity. If you're using proper powders for the application, you can almost always get the published velocity of most load whether it be 2 grains under the "book max" or 2 grains over. If you're running what the manual says is max velocity but you're 3 grains under the max powder charge...you can pretty well rest assured you've found YOUR GUN'S max. Don't think that because you're powder charge weights are under some arbitrary number in a manual that you're "under max". [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Primer Cratering Question
Top