Dr. A:Work up carefully from START toward MAXIMUM watching for signs of excessive pressure or velocity
If you look at the loads comparisons using the 405 and H322 elsewhere in this forum you will see that 1800 fps was achieved in an 18 1/2" barrel at well below Hodgdon's maximum and 1900 fps in a 22" barrel (Ruger) at that same level. The components were not exactly the same as what Hodgdon used, however, so also watch that carefully.What I will say is that it really helps to use a chronograph working up these loads.
Golsovia said:It may not be so fun to discuss going beyond the SAAMI loads without DLA. However, I will only reiterate what jackfish and Dr A said:.....
Watch the details carefully.