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