115 gr RMR 9mm Major *read note before considering this data!*

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  • December 26, 2021 at 4:31 pm #398656
    Nathan Dively
    Participant

    NOTE** Please understand that this is for ammunition reaching Major Power Factor FOR COMPETITION SHOOTING. There are guns that cannot handle these HIGHER PRESSURES and CAN BE DANGEROUS if you do not proceed with caution. Make sure your firearm is built for this before continuing. Also these higher pressures can greatly effect brass integrity.

    Velocity needed for 165 Power Factor: 1435 fps

    Powder: AA7
    S&B Primers
    OAL 1.11-1.12
    Firearm for Data: Tanfoglio Gold Custom v4 Open Class pistol.

    9.3 gr AA7:
    1452
    1441
    1436
    1444 average 1444.2
    1448 standard dev 6.180614856

    9.5 gr
    1476
    1473
    1471
    1493 average 1483.666667
    1495 standard dev 11.44843512
    1494

    9.7 gr
    1499 best dot tracking
    1504 velocities tested with a weak 12 lb spring
    1494 average 1497.75
    1494 standard dev 4.787135539

    9.9 gr
    1528
    1544
    1517 average 1526.75 175 PF
    1518 standard dev 12.52663828

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