Glad to see you are going ahead with a head full of steam.
I've got a Navy Arms short rifle in 357 that was my first rifle. It's sick right now, but it didn't like the cheap short 38s. The best reliability came when I used 357 brass in cowboy loads.
If you are heading to the Tejas Caballeros shoot on the third Saturday, your son is welcome to use my boy's rifle. It is a Marlin 1894CS. Very light and easy to handle.
Hope this helps,