I shot a box of the Duplexes when I got my 10 bore over 20 years ago, awesome shooting loads as all of the Remington's have always been in my BPS, #4, #6 or those Duplex loads, love those old camo hulls. At the time I was running a factory full and any of those loads shot better than any other gun/load/choke I had at the time. Turkey killers for sure. Bet they would be pretty good in a .690-.695 choke.