I have 2 sets of the aluminum Leupold 1 piece mouts and my fav's are made by B-Square, also aluminum, fit's 336, 1894 & 1895 and have multiple cross slots for more mounting options. I use both QRW and warne qd rings and they reliably return to zero. Aluminum is fine. I also have 1 set of Warne 2 piece bases in steel that are fine too, but I like the multi slot aluminum mouts much better.
my $.02
Patty