My only comment would be to make sure you clean barrel after 4-5 rounds - Tops! Its been my experiance shooting sabots in Moosberg 500 and Remington 870, accuracy goes from approx 2" or less at 65 yrds to Pie Plate size or larger groups after 4-5 rounds. Sabot build up really throws off accuracy IMO. The 870 is really finicky about cleaning. It just crys out "Clean Me" after about 4 rounds. Thru the years I've tryed everthing in the 500 and have always gone back to Federal sabots. That barrel seems to love Feds.