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Rifles, Reloading, Optics, Equipment
Reloading
trouble with case stretch
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<blockquote data-quote="Trickymissfit" data-source="post: 460958" data-attributes="member: 25383"><p>Food for thought:</p><p>If your 4320 is of a current powder lot (not fifteen or twenty years old) it maybe much hotter than the old stuff. Looking at a couple of older manuals I saw 45 grains as a max load (117 bullet @ 2900 fps).Yet in the Speer manual they are showing around 41 grains for a 120 grain bullet (seems a little weak to me), and Hogdons shows 43 grains for 2839fps. I think I'd back off about one grain of powder and shoot a dozen rounds to see if that helps any. If the groups get worse, then I think it's time for another powder combo. I think 3100 might have been the ticket (nice dense loads with a mag primer), but it's out of production now. Another one that I think might be even better would be the new MagPro. This should really fill the case up, and it was designed for big overbore cases. I think I'd hunt up a can of MagPro and 4831SC, and start all over</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 460958, member: 25383"] Food for thought: If your 4320 is of a current powder lot (not fifteen or twenty years old) it maybe much hotter than the old stuff. Looking at a couple of older manuals I saw 45 grains as a max load (117 bullet @ 2900 fps).Yet in the Speer manual they are showing around 41 grains for a 120 grain bullet (seems a little weak to me), and Hogdons shows 43 grains for 2839fps. I think I'd back off about one grain of powder and shoot a dozen rounds to see if that helps any. If the groups get worse, then I think it's time for another powder combo. I think 3100 might have been the ticket (nice dense loads with a mag primer), but it's out of production now. Another one that I think might be even better would be the new MagPro. This should really fill the case up, and it was designed for big overbore cases. I think I'd hunt up a can of MagPro and 4831SC, and start all over gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
trouble with case stretch
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