Found this website last night that list's some digital issues of the Double Gun Journal
www.thedoublegunjournal.net/shop?page=4
Here is a list of Sherman Bell's Finding Out for Myself articles by date:
Summer 1999 Finding Out for Myself 12 gauge Pressure Testing
Winter 1999 Finding Out for Myself Black Powder vs Smokeless Pressure Tests
Autumn 2000 Finding Out for Myself III The Forgotten Tens (Lead Shot)
Spring 2001 Finding Out for Myself IV The Forgotten Tens (Bismuth Shot)
Winter 2001 Finding Out for Myself V Long Shells In Short Chambers
Summer 2002 Finding Out for Myself VI Smokeless vs Black
Spring 2003 Addendum Finding Out for Myself Parts III & IV
Winter 2004 Finding Out for Myself VIII Black Powder Rifle Tests
Autumn 2005 Finding Out for Myself IX Fluid Steel, Stronger Than Damascus?
Autumn 2005 Finding Out for Myself Part X Black Powder vs Nitro (Rifle) Pressure Testing
Autumn 2006 Finding Out for Myself Part XI Wall-Hanger Rendezvous- “The Proof” is In The Shooting
Winter 2006 Finding Out for Myself Part XII Wall-Hanger Rendezvous & The Slow Powder Myth
Spring 2007 Finding Out for Myself Part XIII Wall-Hanger Rendezvous-Special Tests
Summer 2008 Finding Out for Myself Part XIV Wall Hanger Rendezvous- Damascus, Remington & Parker
Autumn 2008 Finding Out for Myself Part XV Bulk(y) Powder In Express Rifles
Autumn 2009 Finding Out for Myself Part XVI The Last Rendezvous-Bottom-Of-The-Barrel Wall Hangers
Summer 2011 Finding Out for Myself Part XVII Express Rifle Case Fillers
Please add or change as needed