Ramshot shows max of around 3,100 with 60gr bullets in a 24" barrel. I would think you're max velocity would be in the 2,750 range with the 77gr.
Anyway, JBM predicts good stability with that setup down to less than 1,800 fps so I doubt it's a stability problem and you certainly wouldnt have stability problems with the 55s. They'd be OVER spinning if anything.
You used the same scope but did you CHANGE any settings?
__________________
Nobody plans to screw up their lives...
...they just don't plan not to.
-Andy Stanley
|