11-08-2013, 07:49 PM
So I took a 4 day weekend for veterans day and went to the range with my 24 inch 6.5 grendel.
I wanted to find the correct harmonics for the load I was shooting, 123 Hornandy Amax
I shot a group at 200 yards in 1.5 inch
I took a hacksaw and cut off 1 inch debured the crown and next 4 shot group was .7 inch group
I took another inch off and the group opened to 1.7 inch
another inch and 1.5 again
last inch as I am cutting it down to a 20 inch rifle for my wife and the group are around 1 inch @200 yards
I will pull the barrel tonight and toss it on the lathe true it and recrown.
observations:
the shot group went higher as the barrel got shorter, after 4 inches cut, my shot group went up 4 inches at 200 yards
for Amax Hornandy factory ammo and the AR Stoner barrel I used, 23 inches gives the best accuracy for me.
I wanted to find the correct harmonics for the load I was shooting, 123 Hornandy Amax
I shot a group at 200 yards in 1.5 inch
I took a hacksaw and cut off 1 inch debured the crown and next 4 shot group was .7 inch group
I took another inch off and the group opened to 1.7 inch
another inch and 1.5 again
last inch as I am cutting it down to a 20 inch rifle for my wife and the group are around 1 inch @200 yards
I will pull the barrel tonight and toss it on the lathe true it and recrown.
observations:
the shot group went higher as the barrel got shorter, after 4 inches cut, my shot group went up 4 inches at 200 yards
for Amax Hornandy factory ammo and the AR Stoner barrel I used, 23 inches gives the best accuracy for me.