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
Need help troubleshooting 300 RUM pressure issue.
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="Dano1" data-source="post: 901056" data-attributes="member: 14209"><p>This is just a thought, so take it for what it's worth,</p><p> </p><p>But I had a similar experience with my 6.5-06AI when developing loads using RL-22 and there was quite a difference in temperatures from when I developed the loads (about 75 degrees) to when I was shooting them later (about 90 degrees) the loads that were safe in the 75 degree weather blew primers and were hard to extract at 90 degrees, they were right on the line of being too hot at 75* but felt I was safe.</p><p> </p><p>I share this for 2 reasons, 1) the 40 degree shoulder hides the pressure quite a bit in the Ackley case, as does the very heavy case with the RUM cases. So when coming up to pressure it can and does come up quickly even in 1/2 - 1 grain increments even in such high capacity cases. I load for two different .300 Ultra Mags a we Use Retumbo and 180g bullets, While Retumbo isn't the same powder as RL-33, We are only using a 99g charge and are with in 1g max for 1 rifle and 1/2g max for the other with the 180g bullets (Nosler Accubonds). Maybe too much powder?</p><p> </p><p>2) Maybe RL-33 is temp sensitive like RL22 and can't handle such extreme temp swings......</p><p> </p><p>Just my thoughts and perspective. </p><p> </p><p>Hope this helps,</p><p> </p><p>Dan</p><p> </p><p>And</p></blockquote><p></p>
[QUOTE="Dano1, post: 901056, member: 14209"] This is just a thought, so take it for what it's worth, But I had a similar experience with my 6.5-06AI when developing loads using RL-22 and there was quite a difference in temperatures from when I developed the loads (about 75 degrees) to when I was shooting them later (about 90 degrees) the loads that were safe in the 75 degree weather blew primers and were hard to extract at 90 degrees, they were right on the line of being too hot at 75* but felt I was safe. I share this for 2 reasons, 1) the 40 degree shoulder hides the pressure quite a bit in the Ackley case, as does the very heavy case with the RUM cases. So when coming up to pressure it can and does come up quickly even in 1/2 - 1 grain increments even in such high capacity cases. I load for two different .300 Ultra Mags a we Use Retumbo and 180g bullets, While Retumbo isn't the same powder as RL-33, We are only using a 99g charge and are with in 1g max for 1 rifle and 1/2g max for the other with the 180g bullets (Nosler Accubonds). Maybe too much powder? 2) Maybe RL-33 is temp sensitive like RL22 and can't handle such extreme temp swings...... Just my thoughts and perspective. Hope this helps, Dan And [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help troubleshooting 300 RUM pressure issue.
Top