I didn’t weigh the stock prior to putting it on. With the stock, rings, and scope it comes out to 8.8 lbs on a bathroom scale. Scope is 22.4 oz and the rings aren’t anything lightweight.
Savage Ultralight is advertised at 5.8 lbs.
I have them and my experience is very similar to yours. A definite improvement but didn't gain a ton of room. Scopes are the big limiting factor. I have not tried any different arrangements yet, so I don't have any recommendations outside of your observations here.