Yah, that's a great result for 40 yards. I'm only getting about 6 in the neck vertabre/brain at 40 so I am limited to 35 yards. Is that a factory Rem. choke? I think that's the same one I have. Just black with knurled end for hand installation and a slot on the end for tightening. Hmmmm. Have you tried the barrel-polish that is posted on these forums? I might give that a try and see if it helps.