08-24-2020, 02:29 PM
Dino - how far off was the velocity from Hornady’s latest load data release?
I’m having the same issue with reloading for 90 grain bullets.
Using TAC : I ran a load progression as follows:
26.0 grs - 2565 FPS / 26.5 grs - 2570 FPS / 27.0 grs - 2633 FPS / 27.5 grs - 2670 FPS / 28.0 grs - 2730 FPS / 28.5 grs - 2793 FPS / 29.0 grs - 2800 FPS.
The published Hornady data states: for 87 grain bullets w TAC
26.4 grs - 2500 FPS / 27.4 grs - 2600 FPS / 28.4 grs - 2700 FPS MAX load
So, I’m not sure if going forward WITH POWDERS NOT LISTED I should load based on velocity - because the Hornady data is 100 FPS off from what the barrel is giving me.
As an example, I’ve since tried W748 and WC 846 S powders with the 90 grain bullets.
W748 :
27.0 grs - 2540 / 27.5 grs - 2584 FPS / 28.0 grs - 2620 FPS / 28.5 grs - 2670 FPS / 29.0 grs - 2708 FPS / 29.5 grs - 2750 FPS
WC 846 S (Bulk powder) :
27.5 grs - 2475 FPS / 28.0 - 2525 FPS / 28.5 grs - 2600 FPS / 29.0 grs - 2660 FPS / 29.3 grs - 2716 FPS / 29.6 grs - 2730 FPS / 30.0 grs - 2762 FPS
AS AN ASIDE:
6mm PPC data for w748 shows :
26.5 grs - 2500 FPS staring and 28.5 grs - 2700 FPS MAX load
6mm PPC data for TAC shows :
24.9 grs - 2530 FPS staring and 28.0 grs - 2800 FPS MAX load
So, the 6mm PPC with LESS case capacity seems to be lining up nearly exactly with the Hornady published load data for this class of bullet weight and powder selection .....
They should have just called the caliber (6-ARC) the 6mm PPC AI
I believe we were all thinking that adding a grain of powder to 6mm PPC loads would be a safe bet given the case dimensions and PSI ratings of both calibers - apparently not ......
I’m having the same issue with reloading for 90 grain bullets.
Using TAC : I ran a load progression as follows:
26.0 grs - 2565 FPS / 26.5 grs - 2570 FPS / 27.0 grs - 2633 FPS / 27.5 grs - 2670 FPS / 28.0 grs - 2730 FPS / 28.5 grs - 2793 FPS / 29.0 grs - 2800 FPS.
The published Hornady data states: for 87 grain bullets w TAC
26.4 grs - 2500 FPS / 27.4 grs - 2600 FPS / 28.4 grs - 2700 FPS MAX load
So, I’m not sure if going forward WITH POWDERS NOT LISTED I should load based on velocity - because the Hornady data is 100 FPS off from what the barrel is giving me.
As an example, I’ve since tried W748 and WC 846 S powders with the 90 grain bullets.
W748 :
27.0 grs - 2540 / 27.5 grs - 2584 FPS / 28.0 grs - 2620 FPS / 28.5 grs - 2670 FPS / 29.0 grs - 2708 FPS / 29.5 grs - 2750 FPS
WC 846 S (Bulk powder) :
27.5 grs - 2475 FPS / 28.0 - 2525 FPS / 28.5 grs - 2600 FPS / 29.0 grs - 2660 FPS / 29.3 grs - 2716 FPS / 29.6 grs - 2730 FPS / 30.0 grs - 2762 FPS
AS AN ASIDE:
6mm PPC data for w748 shows :
26.5 grs - 2500 FPS staring and 28.5 grs - 2700 FPS MAX load
6mm PPC data for TAC shows :
24.9 grs - 2530 FPS staring and 28.0 grs - 2800 FPS MAX load
So, the 6mm PPC with LESS case capacity seems to be lining up nearly exactly with the Hornady published load data for this class of bullet weight and powder selection .....
They should have just called the caliber (6-ARC) the 6mm PPC AI
I believe we were all thinking that adding a grain of powder to 6mm PPC loads would be a safe bet given the case dimensions and PSI ratings of both calibers - apparently not ......