Hey gang.
Recently got my first bolt guns and started shooting at increased distances.
Went to a precision rifle course a weekend or two ago. The new to me rifle I brought to the cousre is a savage model 10pc 308 5r 20" barrel. I used federal Sierra match king bthp 168gr. Vortex pst 4-16 Ffp scope. I broke the barrel in and zero'd the rifle before going to the class.
The first day we only shot to 100yd learning and doing different drills and practice. All was well. Rifle very accurate. They had us rapidly engaging eggs. They even put two 308 casings on a ledge to see if any of us could hit one. I hit one.
Next day we moved from 100yd out to 500yd, stopping at 200,300 and 400 along the way.
All shots were done using holdovers. 200 right on. 300 right on. 400 right on. Sub moa shot groups the whole way.
At 500 I ran into a problem. According to the instructor my holdover should have been right at 12moa at 500yd. Even on my isnipe app it shows the holdover as 11.67 moa.
I couldn't hit the target which was a 10" metal plate. There was a spotter and he kept calling my shots low. I finally hit the target with my holdover at 14 moa.
A day or two later I went to a local range and used a chrono. The rounds were averaging 2600 fps, only 50fps slower than advertised for the ammo.
Anyone have any ideas why so much more holdover all of a sudden at 500yd? Is this just normal and every rifles different? I just wonder if this situation will be compounded now going beyond 500yd.
Thanks
Recently got my first bolt guns and started shooting at increased distances.
Went to a precision rifle course a weekend or two ago. The new to me rifle I brought to the cousre is a savage model 10pc 308 5r 20" barrel. I used federal Sierra match king bthp 168gr. Vortex pst 4-16 Ffp scope. I broke the barrel in and zero'd the rifle before going to the class.
The first day we only shot to 100yd learning and doing different drills and practice. All was well. Rifle very accurate. They had us rapidly engaging eggs. They even put two 308 casings on a ledge to see if any of us could hit one. I hit one.
Next day we moved from 100yd out to 500yd, stopping at 200,300 and 400 along the way.
All shots were done using holdovers. 200 right on. 300 right on. 400 right on. Sub moa shot groups the whole way.
At 500 I ran into a problem. According to the instructor my holdover should have been right at 12moa at 500yd. Even on my isnipe app it shows the holdover as 11.67 moa.
I couldn't hit the target which was a 10" metal plate. There was a spotter and he kept calling my shots low. I finally hit the target with my holdover at 14 moa.
A day or two later I went to a local range and used a chrono. The rounds were averaging 2600 fps, only 50fps slower than advertised for the ammo.
Anyone have any ideas why so much more holdover all of a sudden at 500yd? Is this just normal and every rifles different? I just wonder if this situation will be compounded now going beyond 500yd.
Thanks