As promised, here are the pics of the maiden longrange test of the MOAG. It performed better than we all expected. I thought that if one of us was to hit the 15" gong at 2 grand we would be doing well, but as it turned out, 4 guys shot the gun and 4 guys connected!
We set out pretty early so as to avoid the midday mirage. First order of business was confirming a 40" high impact above the aim point at 100 yards. With this sight-in, it gives us a 1500 yard zero without using any minutes in the scope. After boresighting and two shots, we were at 40" high. Then we set the zero on the turret, and fired a shot. It landed 1 second earlier and 500 yards closer than we wanted! [img]/ubbthreads/images/graemlins/confused.gif[/img] In the hussle to get on the gong before the mirage set in, we neglected to go up 27 minutes for a 2000 yard shot!
O.K. Brian B Dialed up 27, and the second attempt went just a tad low and left. Then we proceeded to walk him in. 7mmrhb and his son-in-law, Jared, drove down to the gong and set up about 50 yards shy and out of the way to help guide us in. After just 7 shots, Brian had deafening hit on the gong!
Then we all took turns trading places. I shot next and rang the gong high. Then it was Jared's turn, and he hit on the sixth shot. Then 7mmrhb took a turn and whacked it!
We got 3 of the 4 hits on video including a recording of 7mmrhb's hit from the gong pit. You could hear the gong hits very clearly and quite loudly from 2000 yards away. You could even hear the ones that hit the burm! That 300 grain MK hits with 1130 ft/lbs of energy at 2000!
Several things that were reinforced in todays experiment was the importance of a LOW standard deviation, uniform bullet base-to-ogive measuring, and follow up your sighter with a quick second shot to get the same condition. We noticed that bullets that were 30 fps faster than the others landed a good 60" higher. And the different length bullets changed the internal ballistics enough to raise the velocity about 50 fps. Luckily, I segregated all the bullets into rows according to the ogive length so we could account for the different ballistics.
We were running 96 grains of RL25 behind the 300 MK. WIth bullets all measuring the same ogive, we were getting SD's of 6,7, and 8. Average velocity was 3005.
Another thing that we noticed was when the wind shifted by the gong so that it was blowing at us, the bullet dropped about 3 minutes more. That is over 60" of drop! [img]/ubbthreads/images/graemlins/shocked.gif[/img]
We believe that David Tubb's meplat trimming tool will help in our quest for the most consistent bullets. We will test it on our next outing and post results.
Anyway, here are the pics:
Here is us getting ready to fire.
Here is a pic of the 2000 yard range. The target circled in blue is the 100 yard target where we had to be 40" high! The green circle is around the gong! LOOONG WAAAAY!
Here's Brian getting ready to let one rip!
Here is what the gong looks like through my Swaro Spotter at 2000 yards. The scope is on 30x and the camera is zoomed all the way in.
Here is Brian checking for a hole in the box.
This one is really cool. We aimed the scope at the gong and pulled the bolt out and looked down the bore. It was pointing at the top of Mt. Timpanogos (circled in yellow) and the bullets were dropping into the gong pit! (circled in red)
Here's 7mmrhb and Brian B.
This pic is from the gong pit looking back at my truck squared in pink and in the next zip code.
Two happy dudes!
Jared's hit. Way to go Jared! Call me if you need some backup as a witness at work tomorrow!
If you can't tell, I'm happy!
All the tape spots are shots. The groups ain't bad. We fired a total of 40 shots today and if you count the tape marks, you will see that a good portion of the shots hit the box! We averaged 1 hit every 10 shots.
We found these two bullets at 2 grand. Weight retention was pretty good considering they slammed into fine gravel.
Overall, I'd say it was a good day! [img]/ubbthreads/images/graemlins/grin.gif[/img]
P.S. If some of the pics don't download, you may have to click on this post twice and wait a minute. There is a lot of info for the computer to eat.