I have used 11FS in a couple of cartridges where I would use H110/296. It is a bit faster, higher pressure but seems accurate and clean to shoot. Meters well and consistent from a 40 year old uniflow.

I have used it for 300 Blackout, both as a high velocity 100% density loads and subsonic low density, heavy bullets. In both loads ES numbers were in the mid teens and above average accuracy.

In a 22 K Hornet I had pressure signs about 1 grain and 100-150 fps sooner than 296. A grain does not seem like much but it was probably 8-10% load reduction.

It probably has potential in strong actions, but published loads show most loads are 30k psi plus. I don’t have enough experience with it, or available data to use it in something like a Stevens 44 action.

The flash suppressant is a nice plus in low light conditions with short barrels.

Not much help, but it seems to work as advertised.