Hello everyone.
I just came back from the range and thought I would share my findings... I was shooting at the 100yrd range, temperature was 30 °C, wind velocity was calm, sky condition was clear. Following are some details on the load.
Brass: Remington R-R reloaded 6 times
Powder: RE-15 / 70.0 gr
Bullet: Hornady .375 225gr SP
Primer: WLRM
I shot 2, 10 shot strings through my Pro Chrono Digital chronograph. It was interesting to see the change in velocity as the barrel got hotter and hotter. What I've noticed with the lighter bullets in my barrel, and the 225gr are no exception, well... they don't group as well as the heavier bullets! Some details on the chronograph readings...
First 10 shot string.
HI: 2760 FPS
LO: 2629 FPS
Average: 2721 FPS
Extreme Spread: 131 FPS
Standard Deviation: 35 FPS
Second 10 shot sting.
HI: 2807 FPS
LO: 2715 FPS
Average: 2756 FPS
Extreme Spread: 92 FPS
Standard Deviation: 31 FPS
What's interesting to notice is that, as the barrel and ammunition got warmer, the velocity increased, as one would expect, but the extreme spread dropped.
As far as my groups... well, nothing much to brag about. I had a bad day at the range :roll: ! I will blame it on the hot weather :grin:
Moral of the story, my barrel loves the 260gr Accubonds, and not so much the lighter bullets.
I've added a few pictures taken today. For the ones out there who like my new stock, its an Accurate Innovations.
Regards,
Maurice
I just came back from the range and thought I would share my findings... I was shooting at the 100yrd range, temperature was 30 °C, wind velocity was calm, sky condition was clear. Following are some details on the load.
Brass: Remington R-R reloaded 6 times
Powder: RE-15 / 70.0 gr
Bullet: Hornady .375 225gr SP
Primer: WLRM
I shot 2, 10 shot strings through my Pro Chrono Digital chronograph. It was interesting to see the change in velocity as the barrel got hotter and hotter. What I've noticed with the lighter bullets in my barrel, and the 225gr are no exception, well... they don't group as well as the heavier bullets! Some details on the chronograph readings...
First 10 shot string.
HI: 2760 FPS
LO: 2629 FPS
Average: 2721 FPS
Extreme Spread: 131 FPS
Standard Deviation: 35 FPS
Second 10 shot sting.
HI: 2807 FPS
LO: 2715 FPS
Average: 2756 FPS
Extreme Spread: 92 FPS
Standard Deviation: 31 FPS
What's interesting to notice is that, as the barrel and ammunition got warmer, the velocity increased, as one would expect, but the extreme spread dropped.
As far as my groups... well, nothing much to brag about. I had a bad day at the range :roll: ! I will blame it on the hot weather :grin:
Moral of the story, my barrel loves the 260gr Accubonds, and not so much the lighter bullets.
I've added a few pictures taken today. For the ones out there who like my new stock, its an Accurate Innovations.
Regards,
Maurice
