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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Ultra 220gr SMK data with RL25 and Retumbo from Sierra
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<blockquote data-quote="Brent" data-source="post: 24169" data-attributes="member: 99"><p>I haven't looked at their website or their new manual, but I wonder also if they go that high in either. </p><p></p><p>I never made it past 89gr with Retumbo and the 220 without stiff bolt lift, even though pressure on the Oehler 43 indicated I was at about 63k psi. 88gr is what I settled on. </p><p></p><p>I have yet to go back and check to see what kind of stiffness and psi I get with FL sized cases, but the 178 A-Max showed psi signs down low too, accuracy with both sucked using Retumbo at those charges. I still have the pound of powder sitting there waiting to check some more 220's when I get some. </p><p></p><p>Let me know what you come up with Jon. My OAL was 2.710"... .050" off the lands.</p></blockquote><p></p>
[QUOTE="Brent, post: 24169, member: 99"] I haven't looked at their website or their new manual, but I wonder also if they go that high in either. I never made it past 89gr with Retumbo and the 220 without stiff bolt lift, even though pressure on the Oehler 43 indicated I was at about 63k psi. 88gr is what I settled on. I have yet to go back and check to see what kind of stiffness and psi I get with FL sized cases, but the 178 A-Max showed psi signs down low too, accuracy with both sucked using Retumbo at those charges. I still have the pound of powder sitting there waiting to check some more 220's when I get some. Let me know what you come up with Jon. My OAL was 2.710"... .050" off the lands. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Ultra 220gr SMK data with RL25 and Retumbo from Sierra
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