Starting load for 357mag (S&W revolver)

Reloading
1

Can anyone point me in the right direction for a starting load, for: S&W 686 revolver (357MAG).

Using,
powder: ADI AR2205
bullet: 158gr RNFP; hard cast from HRBC

2

P.S.
I also have AP50N if that’s easier. And Trail Boss. Bah, seems like I am accumulating quite a collection here. Anyway, just a force of habit, since I use 2205 in 44 and 357 carbines, hence said that, but above are alternatives. I just figured 2205 seems to be the go for those things.

Anyway, suggestions appreciated.

3

Havey’s Manual
Starting load for JHP is 14.5gr of 2205. But seems a tad hot for cast, maybe?

4

AR2205 is garbage powder for 357, always ran dirty with unburnt powder left behind. AP50 was better, but AP70 has proven best in all my 357’s from the 4" S&W Model 13 through to the Pythons and Troopers. my AP50 load for HRBC 158g SWC 5.6g, I now load the same pill with AP70 at 6.0g
which gives me 85 to 90% of the Military Loading, Cheers.

5

Awesome, AP50 it is.