I've learned about the 60% rule for Hodgdon H4895 (thanks to members here), and here's another one for Trail Boss, 70% in this case. Stumbled upon it while trawling the net for variations of loading 357 / 38Special. Haven't seen it posted in this forum so thought it might be useful.

https://www.shootingaustralia.net/media ... ilboss.jpg

49er