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It pays to choose good steel bases on your rifle scope mount. One or two piece steel bases, along with steel rings, are considered best. Most shooters prefer one piece bases because they are stronger. However, if you are mounting a scope on your .22, those light aluminum rings and bases will work just fine. But you wouldn't want them for mounting that humongous 6-18 60mm moon scope on your .338. The very heavy recoil could shear those mounts right in two.
Depending on the application the aluminum rings and bases may work just fine, better the consensus seems to be that you'll be a lot better off shelling out a little more for steel rings and bases.