A.S the AR shooters around here love the 8208 popping 55's and heavier. BR guys have shied away from it, they are still shooting N133 in the 6 ppc for best results, although have seen a few going to LT32/ LT30 out to the 300. 30 BR guys absolutely love the 32/30 powders.
While I did get good groups and matched book velocity for a max charge of 8208 for 52 - 55 gr. my ES and SD's were double what I got with the same charge of benchmark plus a 100 fps slower.
I shied away from 8208 after getting a fail to extract, stiff bolt lift and backed out primers while shooting a 25 round match with 30 min time limit on a 90 + degree day.
LT32/30 is still tops in the 223 for groups/ ES/SD although lacking in velocity. Benchmark is a happy medium in between 8208 and LT series. IMO
