I shoot DTL with my sbe2 with 28 gram of 7 shot which is ounce load.it cycles perfect but it is vital that your gun is spotless,stripped down completely after ever use and also make sure you recoil tube in your stock is clean too.i clean my recoil tube every five 3 thousand shells.you would be surprised wat gets in there!!also a wee smear of oil on the rails helps too but dont put too much on!