An early effort with my MKIV. You can see the effects of barrel fouling, two rounds spot on, then it opens up rapidly for #3,4 and 5. I changed the formula for the grease cookie and now can at least get 5 rounds out before I have to mop the tube. All of this talk of MHs is inspiring to take mine to the range this weekend to see if the reworked grease formula is helping on the fouling.
