My combo is the .660 Tappered Percision Choke a custom choke I had done with the Winceshter #5 2 oz loads. I tried the Remington HV 1 5/8 #5 with the .670 and could not get it to group aswell. I believe there is some trile and arrer with it all...BT

PS. I do beleive Maytom shots the Rino with HV shot.......