Fireman_DJ wrote:I asked a very similar question on Sunday (only for a 26" barrel).
I was told around 2800-2900fps.
The reason I asked is I punched in known distances shot against known MOA drop into my ballistic calculator for it to produce a MV.
And it told me I was hitting 3100fps.
Now that sounded high to me, but I used it's figures based on that MV as my starting points for the next three ranges (800,900 and 1000) and I hit the paper every time first time. It needed some adjustment, but I didn't add in the correct temperature, humidity, air pressure etc. so I didn't expect a perfect hit on target.
DJ,
There is a very simple explanation for why you calculated a velocity of 3100 fps.
The elevation turret on your scope is not giving you true adjustment. So the amount that you are dialling is greater than you think.
This is common with scopes like Bushnell and Clearidge etc. You must measure how far your scope moves against a known scale at 100 yards.
This will give you a scale factor that can be applied to correct for the error of your scope.
For known range target shooting you do not really have to do this as you can simply keep a record of the amount needed to dial up for each distance. But for field shooting over laser measured distances you will need to make the correction in order for your ballistic calculator to give you accurate output.