Greetings,
When digging around in the load data for the 6.5 x 55 and 129 grain projectiles I got the impression that the Nosler LRAB was harder than the plain AB or the 129 grain SST I was using and ran pressures up faster. The Hodgdon data is for the plain AB and I suspect you are at or over pressure with 43 grains, especially with fat cases.
Regards Grandpamac.
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