Originally Posted by benchracer
According to Hodgdon, you are about .4g above max. I have heard of some barrels being 100 or even 150 fps slow, but 400 fps slow? Have you confirmed your velocity readings through another chronograph? Is the trajectory consistent with predicted numbers for your measured MV? What is the round count on your barrel? Are your velocities with another powder type out of whack, too?
If you are able to confirm your velocity numbers, I would say you have dimensional issues with your barrel, calibration issues with your powder scale, or a bad lot of powder.
Those are the only possibilities that make sense to me.
Alright that all makes sense.
Yes the trajectory and velocity of 3350 have been confirmed multiple times by shooting @ 500, 600, and 625 yards. I don't own a chrono.
For what it's worth... the ammo he was using before was 45 gr winchester factory loads, advertised to fly @ 4000 fps. The best we ever saw was 3700 out of his gun. So maybe gun personality/barrel issues??
As for the scale/powder being the problem, I would doubt it but I'd have to run a few tests to be 100% sure.
We've got 200 rounds down the tube since buying new.