I'm often on the lookout for what may be a good powder that fits both 357 mag. and 300 Blk. I normally load 357 using 158, 170, or 180 gr. bullets, jacketed and cast. No.11FS seems to get my occasional attention. From what I gather, it came out maybe in 2017, and is better for 158gr. and up bullets in 357. Not sure about 300 Blk preferred bullets. I only recently got it, that it follows the sequence of No.2, 5, 7, and 9. The FS(flash suppressant) threw me off. 
Being a newer powder, there seems to be little write up about it on the net. Though one writer wrote that his sample of St. Marks powders, he was informed that 11FS is H110 with some given power with added flash suppressant.
Anyhow, I was curious if other members here have had good/bad results with 11FS. I have seen it on the shelf at the LGS. Before I add another powder to cache, I'd like to read others' experience.
TIA.
Being a newer powder, there seems to be little write up about it on the net. Though one writer wrote that his sample of St. Marks powders, he was informed that 11FS is H110 with some given power with added flash suppressant.
Anyhow, I was curious if other members here have had good/bad results with 11FS. I have seen it on the shelf at the LGS. Before I add another powder to cache, I'd like to read others' experience.
TIA.
