I do have both books from Dupont and IMR for reloading 20ga hulls . Since some of the recipes from both books on the same hulls show exactly the same results and I am loading only 14 gr. that should be lower than 1200 fps and abt 10000 chamber pressure , it seems to me they are very similar with the different manufacturers . Just because they haven`t listed "all" of the powders , primers and hulls -- which the book may be too heavy to publish for the average reloader , I don`t think I`m taking that big a chance since I`m not looking for a sky buster load for trap , skeet or S/C. They do list 700X in the safe range using 12.1 - 15.5 , although they aren`t listed for the RGC or STS hulls but what the hell . I`ve been shooting this for 4 years . I tried it with 12.5-13 gr. and had light loads and they wouldn`t eject from an auto so I upped it to 14 gr.and they work just fine .