Loading for a Raging Judge Magnum

mapsjanhere

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The Raging Judge Magnum has 3" 410 chambers rated for 454 Casull 60,000 psi. The commercial loads in 454 use the pressure limit but include over an inch of free flight in the cylinder, the commercial 410 loads use the cylinder length but run at 12,000 psi.
Any suggestions to either produce 454 type loads with longer brass (e. g. 444 Marlin), or getting better performance out of the 410?
 
Not really any more useful than the commercial loads.
Found that you can make 3" 410 brass from 9.3x74 that can take 40,000 psi. Seems like a good start, maybe cut to 2.6" for a 45 RJM with a 3" OAL?
 
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