Regrettably, he passed away I believe in 2015. A great loss to our sport and the industry.
My Blaser has 30-06, 500-416, and .375 barrels. All use the Blaser mounting system for telescopic sights. As I would with a Blaser R8, I have a dedicated scope for each set of barrels. In all calibers, with the scope and regulated ammunition, it shoots MOA from each barrel and composite 2 - 2.5 inch four shot (LxR/LxR) at 100 meters. I sight in on the right barrel which gives me the same accuracy of a single shot out to nearly three-hundred meters and the second shot will always be within an MOA or two. I have killed everything from buffalo to oribi with it from ranges better measured in feet to nearly three hundred meters. Of course, I can instantly dismount the scope and use the rifles superb open sights for a follow-up in the thick stuff. A truly remarkable design. With the 'o6, the rifle is regulated for the 180 gr TSX. Remember, this is a double rifle that I can shoot to 300 meters in that caliber. So, I have no use for the 220.
That said, for my next buffalo, I may take my William Douglas & Son .470. It isn't the most practical choice, but sometimes, I suppose one just wants to be a "Stewart Granger wannabe."
https://www.africahunting.com/threads/in-memoriam-professional-hunter-don-heath-passes-away.24482/ The link on Don Heath.