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Upon return from TDY I went back to run the QuickLoad figures. As with all black boxes, results depend on inputs.
I'm using both Winchester and Lapua brass, so the case volume used is 31.3gr H2O. My OAL is that of magazine length -- 2.26 inches. With those provisions, and using HNDY 60gr V-Max I get entirely reasonable pressures with AA2230 ranging from 23.8gr - 24.6gr
Surprised me.
Something else is afoot here for you to be getting the pressure signs you mention.
- What brass/case volume are you using? (though I doubt that's the problem)
- Are you sure of the primer (rifle vs pistol as postulated above)
- Can you get access to a chronograph (velocities normal/outta line)?
- Are you sure of the powder ? (AA distributer heard of other anomolies?)
- Back the bullet off to "standard" 2.26 inches OAL.
Of all the ideas above, go back to a nice 21.5-ish loadout recommended by the AA manufacturer, with a magazine-length cartridge -- and a chronograph
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