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
7mmRUM & Retumbo
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="speedbump" data-source="post: 25346" data-attributes="member: 547"><p>The MRP-2 came highly recommended from a good source, but this thing doesn't like it at all. </p><p></p><p>S1, your results copy what I inferred from testing all those powders - it falls right smack dab on the cutoff between moderately slow & really slow burn rates. There was just about ZERO data out there last year when I began the project, so all the maxs I came up with were developed in-house, by necessity.</p><p></p><p>Warren B., the ones with lower charge weight at max were faster powders (for the most part), at least in mine. They left as much as 5/16" of the case unfilled below the shoulder at max pressure. About the only thing that really filled it up was H50BMG. The 5010 isn't bad, but the super fine-grained WC860 BMG powder is shallow too.</p><p></p><p>My bad on the water weight - it's 111-113gr in an unimproved 7RUM case. I checked. Duh!?!</p><p> <img src="http://images/icons/rolleyes.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="speedbump, post: 25346, member: 547"] The MRP-2 came highly recommended from a good source, but this thing doesn't like it at all. S1, your results copy what I inferred from testing all those powders - it falls right smack dab on the cutoff between moderately slow & really slow burn rates. There was just about ZERO data out there last year when I began the project, so all the maxs I came up with were developed in-house, by necessity. Warren B., the ones with lower charge weight at max were faster powders (for the most part), at least in mine. They left as much as 5/16" of the case unfilled below the shoulder at max pressure. About the only thing that really filled it up was H50BMG. The 5010 isn't bad, but the super fine-grained WC860 BMG powder is shallow too. My bad on the water weight - it's 111-113gr in an unimproved 7RUM case. I checked. Duh!?! [img]images/icons/rolleyes.gif[/img] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mmRUM & Retumbo
Top