Matthew.

I do not have any loads for AS50. In Graeme Wrights book, he lists 27 grns AP70 with a 750 grn slug for 1137 fps. I found this a bit heavy and use 23 grns AP70 which as you have seen works very well. Another load is 34.5 grns AP100 with a 765 grn slug for 1050fps. 34 gns Blue dot for 110 fps. Work up these loads gradually. It will come good. Have fun with it. Wayne