Yesterday was a pretty decent day - 7-10 wind and 44* F. It appears that I, "chickened-out" on going higher with the AA-2200 charge weight!

These results suggest, that as with H-4227, Win 680,etc., there is likely another node just below excessive pressure - I was expecting MagnetoSpeed readings in the 3,000 - 3050+ FPS range.
For small-medium capacity thirty caliber cartridges, with most powders, following an initial group shrinkage/plateau, there is a "blow-up", then, another 1.5-2.0 Gr. higher, another "node". So, I cannot quit yet - next opportunity, I'll also shoot "control groups" with H-4198; Tu-2000; & H-322, along with chasing the powder charge-weight to practical limits.
The head scratching will be, "on the reader" - some interesting [tuning] tendencies seem obvious. RG
The test rifle. The original post has been altered (action/barrel) to correct faulty memory.

The target. For scale, the red-rings are 3/8Ths" wide, while individual bullet-holes are about .299" Dia.
