Am I off or does it seem that 42.0 grains of H4350 under the 120TTSX seems light? My 130 VLD load is 43.5 H4350.
I just ran some ladder tests today using a 22" 1:9".
With the 120 grain TTSX and H4350, primer flattening started to show at 42.2, so their data is accurate on that one.
In the 22", all 120 loads tested peaked out at around 2800 and then started showing some primer flattening much beyond that. Tried H414, H4530, and IMR 4831.
Best for the 120 TTSX was 41.8 of H4350, which was just shy 2800 (2795 average), again from a 22" barrel.
42.8 of IMR 4831 was very accurate, but slower at an average of 2700, but it will work well if that is the powder on hand.
I have tried H4831sc with the 120 before, and it was not a good combination, so would not recommend it with the 120.
Worked with the 100 TTSX also. 44.7 of H414 was the tightest load of the day with an average of 3065 fps. H414 could push it much faster, well north of 3100, but the slower load was much tighter, and very mild on the shoulder.
Still need to try H4350 with the 100's.
All loads were with Lapua brass and F210M's.
