Yeah.. getting 250fps on a 280 rem and nothing on a 270 sorta tells something about the factory loads of the 280...
You do get a wee bit extra usually on the same case with a bigger bore but 0-250fps from .277 to .284??
Heck my 6.5x55Ackley from factory loads 140s in the standard 6.5x55SE at around 2400-2500 to over 3000 is even better...![]()
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