That's me.i may have replied this before i dont know. a shooter in england on another site uses 4f in all his guns up to 70 cals. hunts rabbits and such over their. says it works fine with no problems for him raised a storm on that site but he stuck by it. i tried it in a 50 round ball gun and liked it. 70 grains behind a linen patched round ball. accurate and a lot cleaner than the other courser stuff. when ever this subject is brought up it raises a storm. i live in a high dry climate and moisture isnt a problem way up here.