Boolit question for Rossi M92 .44Mag

[Kestrel4k]

& powder question

Am going to do some load testing for my Rossi M92 .44Mag, and will be flying a little more blind than normal this time so would like a little advice.

I've got some inexpensive 180gr .430" boolits incoming, that are supposedly 16-18 BH (sale thread w/ description here (http://castboolits.gunloads.com/showthread.php?337981-WTS-44-cal-hard-cast-bullets&p=4087815#post4087815)).
I don't know what this M92 bbl slugs at yet - will probably do so at some point, but wanted to do a quick test of these boolits for plinking loads (hopefully subsonic) in this rifle before trying them elsewhere (i.e. my 0.4295" Ruger 77/44).

What I do know about & have experience with are low-to-medium velocity Red Dot loadings w/ softer 240 gr boolits.

I know there is a very good chance of leading if I start in this direction; what powder & charge weights might be a good place to begin with?

I do have a good powder selection to work with: Bullseye, Red Dot, Trail Boss, Unique, 800x, and Blue Dot.
I also have 2400 & H110, but really don't want to go that high if I can avoid it.

I confess to being biased toward Red Dot & Blue Dot, as I have had excellent results with these in the past.

Thanks in advance,

[fecmech]

It should be no problem especially using red dot powder if subsonic is your desire. Pick a pistol load of RD with a 180 cast boolit that runs in the 800-900 fps range. Your rifle will add approx 200 fps to the pistol velocity so that should put you in the 1000-1100 fps range(1100 fps speed of sound). My guess would be somewhere around 5 grs. of RD. IMO bullet hardness at these pressures and velocities is totally irrelevant, plain lead will work just fine for what you want to do.

[Silvercreek Farmer]

My Rossi 92 in 44 mag likes .432 boolits as do many others. Fit is king and all that...

[Shuz]

Try 7g of Trail Boss.