Looking for some advice… I went out early this morning to zero my rifle w/ some new handloads.
* Conditions first thing this AM were: 81F, 47% humidity, Density alt 7255, barometer 25.33.
* My first string of velocities were: 2961, 2972, 2964, 2966, 2969 (with avg velocity of 2966 & std of 5).
Satisfied w/ the loads, I stopped tracking velocities & I then started moving targets out every 100 yards.
100 yds – 0mils / 200 yds - .3mils / 300 yds – 1.0mils /400 yds – 1.7 mils
I left around high noon; however, before leaving I decided to see if the temp (which was now approaching 98F in the sun) had any effect on velocity. I wanted to check this because I have heard from several people that IMR-4350 is very temp sensitive.
I got the following strings: 2609, 2524, 2497, 2538.
Is it safe to assume that because it was so bright out that my Chrony was giving me bad readings? Wouldn’t the heat cause velocities to go up? With such a huge deviation on the last shot string, would I have been able to hit a target at 400 yds & keep the group within 4 inches?
* Conditions first thing this AM were: 81F, 47% humidity, Density alt 7255, barometer 25.33.
* My first string of velocities were: 2961, 2972, 2964, 2966, 2969 (with avg velocity of 2966 & std of 5).
Satisfied w/ the loads, I stopped tracking velocities & I then started moving targets out every 100 yards.
100 yds – 0mils / 200 yds - .3mils / 300 yds – 1.0mils /400 yds – 1.7 mils
I left around high noon; however, before leaving I decided to see if the temp (which was now approaching 98F in the sun) had any effect on velocity. I wanted to check this because I have heard from several people that IMR-4350 is very temp sensitive.
I got the following strings: 2609, 2524, 2497, 2538.
Is it safe to assume that because it was so bright out that my Chrony was giving me bad readings? Wouldn’t the heat cause velocities to go up? With such a huge deviation on the last shot string, would I have been able to hit a target at 400 yds & keep the group within 4 inches?