i recently just bought another Carlson thin wall choke tube for my Auto 5. I've been shooting 3" #2 Kent and Remington Nitro through an IM .705, with good results. I shot some of the cheaper Winchester Xperts and the Remington Sportsman in #2 and they patterned better than the pricier ammo. I also tried #3 in the xperts and sportsman and as far as pellet count goes they were the best yet. I tried an IC and it did pretty good with the #3 but, the #2 were not near as good as the IM. I'm going to buy another Carlson choke either a modified or light modified and pattern it with these same loads. These chokes are labeled "steel or lead" so, when labeled IM, is it IM lead and Full steel or IM steel and Modified lead?