Here's an article link about a guy who built the 470 MBOGO--in the article he has some comparison charts of some of the different big bores-recoil being one of them--for the lott use the 2nd 450 Ackeley load---the lott is pretty impressive across the board IMO in all his charts--it's a good read too---chris

http://www.470mbogo.com/BigBores/BigBores.html