Attempt to recreate Hornady 123 AMAX factory ammo!

[Sniper338]

There was a thread a long time ago about everyone testing certain loads in all their guns and trying to find a combo that worked well across the board and they came up with a few...

[biodsl]

There was a thread a long time ago about everyone testing certain loads in all their guns and trying to find a combo that worked well across the board and they came up with a few...

http://www.65grendel.com/forum/showthread.php?3861-6.5-Grendel-Preferred-Loads&highlight=preferred

[LRRPF52]

Somewhere around 30.8gr duplicates the factory 123gr A-MAX speed for at least one of the lots I chrono'd the same day I shot out to 1200yds the first time.

30.8gr is pretty low for CFE, with about a grain away from max under a 123gr.

Factory A-MAX does 2460fps for me from a 16" AA barrel I installed in my first Grendel build. 31.2gr gives me 2500fps, and the pressures are still under 47,000psi at that point.

[lrgrendel]

LRGRENDEL - yes, as LRRPF52 mentioned, put the Magnetospeed bayo on the rifle (any rifle and load at this point, because I'd like to know how one reads versus the other) and set up your "standard" chronograph as you normally would. Then shoot using both at the same time and record the readings. It would be interesting to know how one compares to the other with the exact same rifle measuring the same shot. You might also shoot with and without the Magnetospeed attached and record the POI difference. I get as much as a 3" shift in POI - and depending on the rifle and load, I think it could be shifted in any direction. The Magnetospeed DEFINITELY affects the point of impact, even if it doesn't affect the group size. Although lighting/weather conditions don't have any effect on the Magnetospeed readings, I don't feel quit confident to use it for my OCW load workup, and I sure can't use it for final load development AND rifle sight-in. Once I establish my optimum load, I can't use the Magnetospeed for final sight-in.

That's why I am excited to see the release of the Labradar ( http://www.mylabradar.com/ ) if it is reliable - no weather and lighting worries (old style chrono) and no shift in POI (Magnetospeed).

Will do but I am only home now for 2 days and am leaving again for a week tomorrow. Probably next week AND I will use the Hornady brass and the Tulammo primers.

[lrgrendel]

So it took me a little longer sorry!

To refresh, loaded up 20 once fired Hornady cases with 123 Amax and 29.1 gr AA2520.

10 with CCI 450 and 10 with TULAMMO primers.

I fired 5 CCI 450 and 5 TULAMMO through both chronographs at the same time. (As requested by Savage Shooter)

Here are the results.

TULAMMO primers. CHRONO 2653,2686,2682,2688,2665
MAGNETO 2568,2592,2600,2605,2573

CCI 450 primers. CHRONO 2661,2685,2694,2698,2722
MAGNETO 2573,2598,2612,2619,2627



TULAMMO primers. CHRONO only. 2647,2661,2636,2661,2665


CCI 450 primers. CHRONO only. 2679,2700,2660,2675,2699

It was a fun exercise.

I think the TULAMMO primers did better. BTW The speed on the Hornady Match advertised speed is 2580.

I also shot CFE for the first time today. I will post some results on that other thread.

[BluntForceTrauma]

LRG, which of your barrels, chambers, etc., generated those numbers?

[lrgrendel]

LRG, which of your barrels, chambers, etc., generated those numbers?

AA 24" Overwatch 1/9 Upper. (Don't know whose barrel it is)
I am sure you noticed the Chrono velocities were much higher than the Magnetospeed....

But overall the velocities were pretty similar to the published number on Hornady 's box

[Savage Shooter]

So it took me a little longer sorry!

To refresh, loaded up 20 once fired Hornady cases with 123 Amax and 29.1 gr AA2520.

10 with CCI 450 and 10 with TULAMMO primers.

I fired 5 CCI 450 and 5 TULAMMO through both chronographs at the same time. (As requested by Savage Shooter)

Here are the results.

TULAMMO primers. CHRONO 2653,2686,2682,2688,2665 Avg. 2674.8 SD 13.6
MAGNETO 2568,2592,2600,2605,2573 Avg. 2587.6 SD 14.7 Difference between Chrono and Magneto: 87.2 fps HIGHER for Chrono

CCI 450 primers. CHRONO 2661,2685,2694,2698,2722 Avg. 2692 SD 19.7
MAGNETO 2573,2598,2612,2619,2627 Avg. 2605.8 SD 19.0 Difference between Chrono and Magneto: 86.2 fps HIGHER for Chrono



TULAMMO primers. CHRONO only. 2647,2661,2636,2661,2665 Avg. 2654 SD 10.9


CCI 450 primers. CHRONO only. 2679,2700,2660,2675,2699 Avg. 2682.6 SD 15.2

It was a fun exercise.

I think the TULAMMO primers did better. BTW The speed on the Hornady Match advertised speed is 2580.

I filled in the Averages and SD for each string. Although the numbers might not be statistically significant given the small sample size, there was a consistency to them. Between the two sets, the Chrono was a consistent 86-87 fps HIGHER than the Magneto speed which interestingly enough is AT THE MUZZLE compared to what was likely 12-15 feet away for your Chrono. And while the CCI 450s appeared to give higher velocity than the Tulamos, they also gave higher Standard deviations.

[lrgrendel]

Ok. Just to wrap this up. Shot again today. 5 shots at 100 and 5 at 200yds. Only put the chrono on the 100.

Lapua brass. 29.1 gr AA2520. Tulammo primers. 123 Amax.

This load definitely shoots well out of my gun. I still believe my Chrono is showing higher than actual velocities but it still works fine for me as long as I compare " apples to apples".

This may be my new "300 yd F Class" load!

I do believe the Tulammo primers made a difference.
The SD and ES were not great but the targets were not bad.