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Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
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<blockquote data-quote="Tumbleweed" data-source="post: 855651" data-attributes="member: 9281"><p>Kirby, thanks to this thread and MontanaRifleman's encouragement I gave RL33 a try in my brand new full custom Rem 700 300 RUM. It wears a 32" Broughton 5C 9 twist. I was able to push the Berger 230 Hybrid Targets at 3100fps when I hit the end of the road with Retumbo. With my custom throating design and this long barrel I felt that it would do better in the velocity department. I decided to try RL33 and like you, I loaded up until the pressure signs on the case equaled the Retumbo loads. At 102 grains of RL33 the barrel would not burn any more powder as 103 and 104 grains produced about the same velocity. Might I mention that velocity was 3250fps. I backed down to 101.5 grains and it is now a .5MOA shooter and is running 3240fps with <strong>NO</strong> visible signs of pressure on the case head. Through the chronograph ES seems to be a little on the wild side but my targets are showing me otherwise and I suppose that is the final word.</p><p></p><p>700 yards, shifting 1mph wind, vertical dispersion is only .375"</p><p>[ATTACH]25769[/ATTACH]</p><p>[ATTACH]25770[/ATTACH]</p></blockquote><p></p>
[QUOTE="Tumbleweed, post: 855651, member: 9281"] Kirby, thanks to this thread and MontanaRifleman's encouragement I gave RL33 a try in my brand new full custom Rem 700 300 RUM. It wears a 32" Broughton 5C 9 twist. I was able to push the Berger 230 Hybrid Targets at 3100fps when I hit the end of the road with Retumbo. With my custom throating design and this long barrel I felt that it would do better in the velocity department. I decided to try RL33 and like you, I loaded up until the pressure signs on the case equaled the Retumbo loads. At 102 grains of RL33 the barrel would not burn any more powder as 103 and 104 grains produced about the same velocity. Might I mention that velocity was 3250fps. I backed down to 101.5 grains and it is now a .5MOA shooter and is running 3240fps with [B]NO[/B] visible signs of pressure on the case head. Through the chronograph ES seems to be a little on the wild side but my targets are showing me otherwise and I suppose that is the final word. 700 yards, shifting 1mph wind, vertical dispersion is only .375" [ATTACH]25769.vB[/ATTACH] [ATTACH]25770.vB[/ATTACH] [/QUOTE]
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338 Allen Xpress, RL33 load development
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