The RCBS 45-270-SAA 270gr SWC over 16.0gr of 2400 will generate approx. 14 kpsi and be safe in both weapons. You should have over 900 fps in the revolver. Jacketted bullets at subsonic velocities risks sticking the bullet in the bore. The 250gr SWC/8.5gr Unique load posted by rcmodel is a very good choice too.
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