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Converting G1 to G7 BC

DIBBS

Old Mountain Man-Tired occasionally Grumpy SOB
Full Member
Minuteman
  • Aug 21, 2008
    3,489
    3,881
    WARSHington State
    Is this formula that was posted in a thread 12 years ago still valid?

    g1 x .512=g7

    I have some old red/green box .257 Nosler ballistic tips that I could not find a published G7 BC for, in 85 and 100 grain weights. In addition I have some 100 grain BT's with a cannelure that I would imagine that the BC will be slightly lower than the smooth ones? I also have 110 grain accubonds from the same time period, and don't know if the bullet profiles/G1 BC's have have changed as well over time. I did several searches and was unable to find a published G7 bc, but did see a post or two stating that Nosler's G1 may be inflated.

    I'm working on developing a load with the 85 or 100 grain bullets that will hopefully produce shock, awe, and massive destruction on a coyote or three this winter. The 110's may be used on deer... next year

    TIA