I have never been a fan of the autos, but REMINGTON Pumps ARE a favorite!!! From the Lil 22 to the old 14 and 141's to the newer 760 , 7600 and your model 6 even the 870's!! I have a couple (

) and all are good to very good shooters!!
One old 760 in 35 Rem is a tack driver. That one is my wife's. I found a old beat up stock set on EBay, refinished it and chopped it to a shot LOP for her small frame and she shoots it pretty good. Another newer 760 in 6MM is also a great shooter!! My good friend down in Florida has that one. He would borrow it every deer season up here. Then moved to FL , got married started a family and had even less $$

I made it a gift to him about 7 years ago. He has kept his freezer filled with the little swamp deer they grow down there.
I had a 35 Whelen for a while. I shouldn't have sold that one... I took it to VT hunting one year and didn't return home with it. One of the guys has been looking high and lo for one to no avail. He made me a fair offer and now owns it.
I had one 308 that was wonderfully accurate AFTER its first shot... Never did figure it out either! The first shot would hit 2-3" out of the group, then settle in to just over an inch at 100.
Enjoy you M6 it sounds like a good one!!
CW