I use Von Gruff' s developed load of 63.0 grains AR2209 (sold as H4350 in the States) under his 350gr or my 400 grain gas checked cast bullet for 1800fps (the 360gr) in my 404.

Also tried his load of 20.5 grains Red Dot (1400fps) for an easy shooting accurate light load and my own Unique powder loads (22.5 - 25.0grs) for similar results.

Also loaded up a couple of my Berdan primed Kynoch cases with 20.5 grains Vectan AS powder for a real smooth ultra clean burner light load. Only shot two of these just to see what this powder was like as it is supposed to be equivalent to Red Dot in burning rate. Both bullet holes touched at 50m. have got more loaded to try next time at the range

VG has developed other cast loads right up to original factory velocity levels.

350gr Cast with 63.0 gr AR2209 (H4350) at 50m