I have from http://data.hodgdon.com a load for a 125gr FMJ that's 1.09 OAL & a charge range from 3.5 to 3.7, with that I'm gonna back down to 3.5gr and see where I chrono. I'm gonna be outta town for a while so I won't be able to report on my findings until the week after July 4th. If anyone has loaded a 124 on Clays, please post load data, insights, insults and heresies :-)
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Joe