I've done very little long range shooting so when I found myself deer hunting on a stand with 400yrs of shooting I went to a ballistics calculator. My Grendel is set-up for hunting the big woods of northern WI. Due to unforseen circumstances the second half of deer hunting was in the central farmlands.
I have my Grendel zeroed at 50yrs, which gives me 1.5" high at 100yrs and 3.5" low at 200yrs. This I have shot at the range. So now my discrepancy, I wanted to find out the estimated drop at 300 & 400yds. Using Hoernady's ballistic calculator, I enter my fps and all other info and the numbers don't match up. To get the numbers to jive I have to add in an additional 272fps.
I chronographed my load at 2128fps using the MagnedoSpeed chronograph. To match my range results I need to input 2400fps. Anyone seen similar results or maybe it's the chronograph?
I have my Grendel zeroed at 50yrs, which gives me 1.5" high at 100yrs and 3.5" low at 200yrs. This I have shot at the range. So now my discrepancy, I wanted to find out the estimated drop at 300 & 400yds. Using Hoernady's ballistic calculator, I enter my fps and all other info and the numbers don't match up. To get the numbers to jive I have to add in an additional 272fps.
I chronographed my load at 2128fps using the MagnedoSpeed chronograph. To match my range results I need to input 2400fps. Anyone seen similar results or maybe it's the chronograph?