Hi, new member with a question: new to reloading I have a Marlin 1894 CS .357/38 spec: Would like to reload a Bear Creek 125 gn molly coated RFP for CAS: I have win 231; Unique; HP 38; Hodgdon 800X: Which is these power could I use?
Thank you and be safe

Just wanted to say welcome.

As to your powder choice I have no clue. which case? 38 or 357

38spec

Unique will work for both cartridges.

Welcome, I am also a fairly new reloader from Las Vegas . My Speer reloading manual has an entire chapter on loading for cowboy action. I recommend you get at least 2 manuals in hardback. I have found them and this web sight envauable. FYI , spurlocks in Henderson and accuracy on bolder hwy have manuals and a good selection of components. Send me a pm if I can help with any local questions.

try 4 grs of 231.
my mom shoots that in the cas shoots.

I use tightgroup in my .38 special so can't help with a recommendation....but would advise to keep away from the 800-X as it don't measure well.....it's a course powder and bridges in my powder measure.....even when I reload 20 ga shells I have to weigh the charges as the MEC won't meter very accurately......

With the Marlin .357 Magnum it is better to use a slower burning powder to get the optimum velocity in the 18" barrel. Go to Hodgdon/IMR website. Pick rifle calibre and then .357 Magnum. They give you all the data:

http://data.hodgdon.com/cartridge_load.asp