Thread: 2206H 75bthp & 77TMK's

Hi, normally run BM2 with 75bthp & 77TMK's out of 16" barrel AR 1:7 & 1:8's quite nicely.

Have a 4kg of 2206H sitting in garage needs to be used, has anyone had success with this on the heavier 223 projectiles or should I just grab some more BM2?
Need to check diary, but think was at around 24gr BM2 at max mag length could fit in metal mag that would feed? Think this was a fairly max load, how does 2206h compare?
Cheers.