Just use the moly sparingly ... don't want to foul the hammer bore with it. ( Slow hammer way down )
no offense, but I think most of the problem is the shooter, compounded by the manner in which the gun is being rested. that little bipod thingy, right in front of the trigger, isn't a very stable platform. it's too far back, allowing too much wobble of the barrel. also,those things were designed as a vertical foregrip / field expedient rest, appealing mostly to the armchair commando. they fall short on both counts, in my book. if you really want to see what your gun is capable of, ( the rest of us would like to see, as well ), get it on some solid footing, like front and rear bags, or better yet, lock it down in a gun vice. and, try some different pellets. the jsb's may not be the hot ticket, for that gun.
So far only kings. I have some polymags but I know they aren't extreme long range rounds and I didn't buy them for that. At this point I plan to get the Straight Shooter variety pack and see what I can get out of all of those. Probably will take a couple weeks to get that and test them.