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
Retumbo or H50BMG in 32" 300 RUM?
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="Tumbleweed" data-source="post: 855377" data-attributes="member: 9281"><p>Well, I got out and began shooting 3 shot groups starting with 102 grains RL33. I also sent a group at 103 and 104 grains. I had good conditions for the chronograph to perform well. The groups were shot at 275 yards and ranged from 2"-3". I noticed that velocity did not improve over 102 grains as the barrel simply couldn't burn any more powder. 104 ended up being a max safe load. Velocities with all three loads averaged around 3250fps. Accuracy was obviously not good enough as I'm looking for .5MOA or under. Here's the awesome thing, I backed down to 101.5 and groups calmed right down but the velocity stayed at 3240fps average. No pressure signs at all on the case head. The 275 yard group measured 1.125" with two in the same hole. I took it out this morning to shoot 700 yards before the wind picked up. I had a very slightly shifting 1mph wind. The 700 yard group measures 4.5" and vertical spread measures a whopping .375". The shifting wind could have easily moved the left bullet out of the group. I'm settling on this load.</p><p> </p><p>275 Yard Group</p><p>[ATTACH]25746[/ATTACH]</p><p>700 Yard Group</p><p>[ATTACH]25747[/ATTACH]</p></blockquote><p></p>
[QUOTE="Tumbleweed, post: 855377, member: 9281"] Well, I got out and began shooting 3 shot groups starting with 102 grains RL33. I also sent a group at 103 and 104 grains. I had good conditions for the chronograph to perform well. The groups were shot at 275 yards and ranged from 2"-3". I noticed that velocity did not improve over 102 grains as the barrel simply couldn't burn any more powder. 104 ended up being a max safe load. Velocities with all three loads averaged around 3250fps. Accuracy was obviously not good enough as I'm looking for .5MOA or under. Here's the awesome thing, I backed down to 101.5 and groups calmed right down but the velocity stayed at 3240fps average. No pressure signs at all on the case head. The 275 yard group measured 1.125" with two in the same hole. I took it out this morning to shoot 700 yards before the wind picked up. I had a very slightly shifting 1mph wind. The 700 yard group measures 4.5" and vertical spread measures a whopping .375". The shifting wind could have easily moved the left bullet out of the group. I'm settling on this load. 275 Yard Group [ATTACH]25746.vB[/ATTACH] 700 Yard Group [ATTACH]25747.vB[/ATTACH] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Retumbo or H50BMG in 32" 300 RUM?
Top