I have a Parker lifter with 2 5/8" chambers - with a .060 step at the end of the chambers. The bores are .800 [ a over bore by todays standards ]. There are no forcing cones. I've cut the shells at 2 5/8". I've tried useing load data for low pressure 10ga from Sherman Bell and Tom Amhurst. The gun weighs 9.5 lbs and kicks like hell. Called Craig from Circlefly and tried his load [ Rem. hull,30grs of 7625, Rem SP10 wad, and 1 3/16 of shot] that he claims is nice to shot at clays all day. I believe his gun has 2 7/8 chambers, but not sure. This load also causes my gun to kick bad. So I loaded up 1oz and 1 1/8oz loads with 20,22,24,26, and 28grs of 7625. At 24grs and 1 1/8 oz the recoil was acceptable. Previousaly I had tried a recomended load with 700X and also had excessive recoil. My question is why does the shorter shells recoil more than longer shells [ with the longer chambers ]? At one time I loaded 2" 12ga shells and had the same problem. With paper wads in the 10 recoil was acceptable. Has anyone any experience with a 10 and 2 5/8' chambers ? Paul