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Rifles, Reloading, Optics, Equipment
Reloading
Experiences with high overbore cartridges and powder bridging
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<blockquote data-quote="fmuguira" data-source="post: 2139084" data-attributes="member: 27974"><p>I would suggest H1000 and Retumbo as workable but you'll still have a lot of case space left even when you ve reached max pressure. Start low and do your own work ups; preferably with a chronograph assisting you too. 57 grs of H1000 will be getting warm/hot depending on your rifle and 59/60 of Retumbo will do like wise. That's with a 105-108 grain projectile. We re running 62-63 grs of R33 and its max in our rifles, gives an extra 50-75 over the single base Hodgkin powders. H869 you can approach 66-67 grs depending again on your rifle. </p><p></p><p>As mentioned earlier these are max range loads in our rifles, with our free bore, etc. Start lower and be cautious and gradual. I always remind myself and others that the last 50-100 FPS really makes no measurable performance different; unless you consider loose primer pockets, beaten up brass, etc a gain !! <img class="smilie smilie--emoji" loading="lazy" alt="😂" title="Face with tears of joy :joy:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f602.png" data-shortname=":joy:" /></p><p></p><p>Good luck</p></blockquote><p></p>
[QUOTE="fmuguira, post: 2139084, member: 27974"] I would suggest H1000 and Retumbo as workable but you’ll still have a lot of case space left even when you ve reached max pressure. Start low and do your own work ups; preferably with a chronograph assisting you too. 57 grs of H1000 will be getting warm/hot depending on your rifle and 59/60 of Retumbo will do like wise. That’s with a 105-108 grain projectile. We re running 62-63 grs of R33 and its max in our rifles, gives an extra 50-75 over the single base Hodgkin powders. H869 you can approach 66-67 grs depending again on your rifle. As mentioned earlier these are max range loads in our rifles, with our free bore, etc. Start lower and be cautious and gradual. I always remind myself and others that the last 50-100 FPS really makes no measurable performance different; unless you consider loose primer pockets, beaten up brass, etc a gain !! 😂 Good luck [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Experiences with high overbore cartridges and powder bridging
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