184 - 7 SAUM load development.

[DanielMaple]

couldn’t find any load data for the 184-f 7Saum so decided to do my own work. This is posted for informational purposes and may not work for you. Please work up your own loads carefully.
Please give your suggestions what load's you would explore. Looking for a high and low node to play with from each of the 3 powders.

Rifle. SAAMI chamber / Defiance anti x SA / proof elevation MTR stock, TT Diamond, Wyatt's box, TI pro brake , spartan bipod, NX8 4x32- 22" 1:8 TW proof. 800ish rounds



Brass ADG started 3x ended 4x, amp annealed, Henderson trimmed, bumped .0015 SAC Modular Die, 2815 mandrel.
Bullet 184-f. COAL 2,9640

Radar: Andiscan a2 (within 3-4fps Labradar and magneto speed)

Powder dispenser: SuperTrickler. Loaded +/- .02

Powders: / charge.

H4831sc 1 shot 57 grain 2703 - 3 at 57.75
2730 ish. 1" group clickers, heavy bolt, extractor marks. Didn't explore further.

N560 - 34 degrees
57-59.75 / 2646 to 2785 Pressure at 59.25 heavy pressure 59.75.



N565 41-degrees61-62.75 / 2717 to 2888. Light clicker 62.5. Extractor mark at 62.75.




H1000 45-degrees.
60.1-63 / 2724 - 2805 light clicker 62.77 moderate clicker 63.




I was up and down with young boys throughout the test, so multiple cold bore shots and constant mounting.H1000 groups were impacted by loose brake I didn't notice until 5th round of N565. So take that into account.

Interesting, bullets across the powders seemed to have same POI at a given velocity.

Seems like the best balance of node/SD/ES/accuracy was between 2695-2750.

I chose a low charge of 60.86 H1000 to test 5 shots.


Thoughts, input on additional loads loads to test are welcomed

 

[zacko]

Nice work mate, beauty rifle .

That seems long for saami I'm loaded at 2,935 and im roughly 100thou longer than saami I had mine throated for the 168vld recently changed to the 180 eldm still loaded at 2,935 which puts alot of bullet in the case superbly accurate.

Looks like it's going very well so far iv found fed 210s best for me

Zac

 

[DanielMaple]

couldn’t find any load data for the 184-f 7Saum so decided to do my own work. This is posted for informational purposes and may not work for you. Please work up your own loads carefully.
Please give your suggestions what load's you would explore. Looking for a high and low node to play with from each of the 3 powders.

Rifle. SAAMI chamber / Defiance anti x SA / proof elevation MTR stock, TT Diamond, Wyatt's box, TI pro brake , spartan bipod, NX8 4x32- 22" 1:8 TW proof. 800ish rounds

View attachment 537659

Brass ADG started 3x ended 4x, amp annealed, Henderson trimmed, bumped .0015 SAC Modular Die, 2815 mandrel.
Bullet 184-f. COAL 2,9640

Radar: Andiscan a2 (within 3-4fps Labradar and magneto speed)

Powder dispenser: SuperTrickler. Loaded +/- .02

Powders: / charge.

H4831sc 1 shot 57 grain 2703 - 3 at 57.75
2730 ish. 1" group clickers, heavy bolt, extractor marks. Didn't explore further.

N560 - 34 degrees
57-59.75 / 2646 to 2785 Pressure at 59.25 heavy pressure 59.75.
View attachment 537661
View attachment 537662

N565 41-degrees61-62.75 / 2717 to 2888. Light clicker 62.5. Extractor mark at 62.75.

View attachment 537663
View attachment 537664

H1000 45-degrees.
60.1-63 / 2724 - 2805 light clicker 62.77 moderate clicker 63.

View attachment 537673
View attachment 537675

I was up and down with young boys throughout the test, so multiple cold bore shots and constant mounting.H1000 groups were impacted by loose brake I didn't notice until 5th round of N565. So take that into account.

Interesting, bullets across the powders seemed to have same POI at a given velocity.

Seems like the best balance of node/SD/ES/accuracy was between 2695-2750.

I chose a low charge of 60.86 H1000 to test 5 shots.
View attachment 537677

Thoughts, input on additional loads loads to test are welcomed

Doesn’t seem to be much interest it the 184-f, but I thought I’d post my results.
Went with 59.95 H1000. I shot at 385 yards today. Winds were gusting 5-25 quartering from my left. Only shot 3. Drop/vertical was good but I was off .25 MOA right. (Pic 1)
Went shot 4 confirmed off right (pic 2).
Adjusted.25 - shot 9 (pic 3)

Happy with the load so far. 20 shot SD 4.8 /es 13. 2728 average. Going to take it out to 1k and see if it holds up.

 

[Utpikahtr]

couldn’t find any load data for the 184-f 7Saum so decided to do my own work. This is posted for informational purposes and may not work for you. Please work up your own loads carefully.
Please give your suggestions what load's you would explore. Looking for a high and low node to play with from each of the 3 powders.

Rifle. SAAMI chamber / Defiance anti x SA / proof elevation MTR stock, TT Diamond, Wyatt's box, TI pro brake , spartan bipod, NX8 4x32- 22" 1:8 TW proof. 800ish rounds

View attachment 537659

Brass ADG started 3x ended 4x, amp annealed, Henderson trimmed, bumped .0015 SAC Modular Die, 2815 mandrel.
Bullet 184-f. COAL 2,9640

Radar: Andiscan a2 (within 3-4fps Labradar and magneto speed)

Powder dispenser: SuperTrickler. Loaded +/- .02

Powders: / charge.

H4831sc 1 shot 57 grain 2703 - 3 at 57.75
2730 ish. 1" group clickers, heavy bolt, extractor marks. Didn't explore further.

N560 - 34 degrees
57-59.75 / 2646 to 2785 Pressure at 59.25 heavy pressure 59.75.
View attachment 537661
View attachment 537662

N565 41-degrees61-62.75 / 2717 to 2888. Light clicker 62.5. Extractor mark at 62.75.

View attachment 537663
View attachment 537664

H1000 45-degrees.
60.1-63 / 2724 - 2805 light clicker 62.77 moderate clicker 63.

View attachment 537673
View attachment 537675

I was up and down with young boys throughout the test, so multiple cold bore shots and constant mounting.H1000 groups were impacted by loose brake I didn't notice until 5th round of N565. So take that into account.

Interesting, bullets across the powders seemed to have same POI at a given velocity.

Seems like the best balance of node/SD/ES/accuracy was between 2695-2750.

I chose a low charge of 60.86 H1000 to test 5 shots.
View attachment 537677

Thoughts, input on additional loads loads to test are welcomed

Thank you, this was helpful. Most of which falls into the confirmation bias category for me. I’m running a 20” proof and finding best accuracy nodes around the 2700 ish mark as well. I’m running 175 eldx .020 seating from lands 3.055 coal and 2.342 off the OJ, with both h1000 & 4831sc both tend to have the best nodes around 2700. Group size has been ok not great, all around 1moa at 100. Best group so far was with 57.5 of 4831sc.
Did you run any testing on seating depths?

 

[DanielMaple]

Thank you, this was helpful. Most of which falls into the confirmation bias category for me. I’m running a 20” proof and finding best accuracy nodes around the 2700 ish mark as well. I’m running 175 eldx .020 seating from lands 3.055 coal and 2.342 off the OJ, with both h1000 & 4831sc both tend to have the best nodes around 2700. Group size has been ok not great, all around 1moa at 100. Best group so far was with 57.5 of 4831sc.
Did you run any testing on seating depths?

I did do a seating test, believe I ended close to .050 off.
With H4831sc you likely are running at or slightly above pressure, might find a little better, more consistent node closer to 56.5-57 grains

 

[Harvey_NW]

You could have saved a lot of components by shooting only 1 shot at each charge looking for pressure, then backing off a grain or so, and confirming with a valid sample. Nodes (the way shooters reference them anyway) have never been proven to exist and be repeatable, there's just 70% variability in 3 shot groups. In most cartridges dropping the powder charge can have a positive effect on dispersion, but the idea that there is a "low node and high node" where it's good at those 2 points but just goes to shit in between, is fallacy. Same with seating depth in most modern chambers. Start shooting 10+ shot groups and all of that nonsense goes away. And if anyone feels compelled to prove it, it takes 30+ to get below 10% variability.

 

[DanielMaple]

ya i know, Nodes don’t exist, tuners don’t work, sample size is statistically insignificant, and my groups are too small.
Here is another load i developed using my method.
first is 5 / 5-shot groups at 100, then 15 shots at 1,000. once i quit messing with elevation , looked promising. but of course its statistically insignificant.

shots 3-4 trended high as barrel warmed, adjusted down; shot 5, 6, 7, 8, adjusted up (too much) shot 9, down 1 click shot 10-15. vertical looked good to me?