308 at 1372 yards

[John-Pure Precision]

Here is a clip of me shooting my practice rifle at 1372 yards. It shows that a 175 SMK out of a 24'' bbl can stay on target through the stages of super sonic and transonic speeds.
[ame]https://youtu.be/Nt6cCpJrvlg[/ame]

 

[Lone Hunter]

What is your MV?? I am running 2754 fps out of a 26" Broughton with a 175 SMK. Shooter shows I am getting sub sonic at 1260 yds. My elevation is only 1000 ft. Bet yours is prob. Around 6,000 ft. My temp was at 80 degrees. Wish I could get to shoot that far but 1,000 is all I'll be able to get. .308 is not the best but it will do. Nice Shooting.

 

[John-Pure Precision]

My elev. was 9965 feet. Station PSI was around 21.2. The bullet was for sure going through the stages of transonic to subsonic. I have to check MV I'm thinking around 2724 fps.

 

[MMERSS]

Here is a clip of me shooting my practice rifle at 1372 yards. It shows that a 175 SMK out of a 24'' bbl can stay on target through the stages of super sonic and transonic speeds.

That is one beautiful place to shoot. Hopefully the drive isn't too far. Have you had the opportunity to use the BR2 for more precise predicted drop confirmation in the transonic to subsonic zones? The BR2 is attractive with dual purpose of ranging and computing at the same time. I additionally use a dual purpose analytics package for transonic to subsonic shooting. It's somewhat of an inconvenience having to be on a laptop however, if I had access to multiple targets at various range, packing along the laptop is well worth the extra effort. The best part about shooting to determine drop with transitioning between the zones is not the range but rather the speed of the bullet. I find the larger capacity cartridges with low drag bullets and higher velocity a pain in the back end due to the very long range needed before the bullet slows enough to start the transition.

I use Applied Ballistics Analytics on a laptop that provides the ability to utilize a solver specifically for the transonic and subsonic zones. This package allows for practice with the uncertainties associated with long range shooting. I can Mil (MOA is more like it) the size of the rock and input the dimensions along with estimated uncertainties. The solver will "predict'" a hit percentage. I can fire a shot, spot the impact, and use this information to confirm or deny the estimates and percentage of hit prediction. Then it's off to another sized rock at a different range with the process started all over again. At times I learn more by missing with practice in the transonic to subsonic zones than by other forms of practice. The dual purpose of a solver specifically intended for the transition between the zones along with WEZ justified my purchase of the program. I additionally use WEZ for range cards during hunting season which is another huge benefit of the solver.

The program allows a custom drag bullet selection for a majority of bullets (the 175 SMK one of them) and calibrates the drop with MV in the upper end of the supersonic range. The transonic to subsonic range is calibrated based on Mach speed. I have a difficult time trying to explain this with other ballistics wizards that can do a better job explaining how this works.

Anyway, I'm recommending use of this package for the reasons stated above. I've learned more by use of this package this last year than from a long period of shooting (estimates relating to hit percentage). This is only my opinion but if there is a chance to borrow or use AB WEZ combined with custom drag and drop scale factor, borrow it and use it for self-improvement. If for anything else, shooting rocks long range is horribly fun. Even more so to hit them with first round.

 

[John-Pure Precision]

I appreciate the in-depth look at the AB program, I have recently started using this item and am vary impressed! The G7BR2 is a great tool and I have had huge success with it since I have owned it for the past 3+ years. It has led to one shot kills from 600 yards all the way to 909 yards. I have never got a reading that did not match all high BC programs I have used. My target engagement time is between 55 and 70% faster with this unit which we all know is the most important thing.
It has it's limitations though as it only gives you compensated data out to 1400 yards. This is more then enough for a hunting situation for me but when it comes to ELR for training and just down right fun you will need a BC. The Rangefinder itself has ranged targets out to 2500 yards for me so it's still a great tool for ELR. I love the sounds of the AB calc. you have pointed out, I will have to just keep taking everything to the next level.

I have posted a link where the G7BR2 was used on every long range kill. I have posted this on this site before so sorry if you have seen it before.
[ame]https://youtu.be/vx5lHW89F2I[/ame]