i've never had so much trouble developing a load as i have with this round in a little martini cadet. i tried lil gun which gave very erratic results, 4227 which worked sort of 4198, h110 and all of them gave me sticky extraction problems. even though not near max. it seemed that peak pressures were hitting to soon.. i read quite a few articles on the round with aa1680, but for the last couple years i couldn't find any. finally some appeared at he local gun shop. It didn't take long to solve my problems using the 1680, even with what i consider to be a max load of 11.8 grains with a 20 gr bullet extraction is normal

Vv N110 is good powder for that little sucker.
9½ grain will get me past 3650fps out of my CZ 527 and with 43500psi as max.