More testing with 4227. Greg got little over 1500 fps in 3" plastic with 870 gr slug using 74-75 gr of 4227. I did the same. This compares to much lighter REM Buckhammer slug, we have more speed. Almost all the way through 5 ft bundle hardwood boards. I have Mossy 695 as well as GEHA 12 gauge to put heavy rifled barrels on. And my 87. Will be checking Mossy 395 for a guy who wants to put on a heavy barrel.Here is pic of 695 bolt action Mossberg with dinky barrel and the heavy long rifled barrel for it. Ed