My .260 shoots flatter to 400 than my Calc says it should.
It also catches up at 5 and 600.
Not sure why but it is only by a couple inches and I have my turret pre-set for 3 and 400 opposed to what shooter says it should be anyway.
Velocities are pretty consistant over different days of testing so I am sure that my muzzle velocity is not the main issue.
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