There is nothing wrong with using aluminum bases for your scope mounting. I have been using aluminum bases for years, and I have never had a problem with them. I used nothing but Seekins for quite a while, but I have now also started using the Weaver Tactical bases. It also has the recoil lug machined in, so there is no worries about heavy recoil destroying the base or screws.

You will be fine with the base you have, unless you just don't like it.

DK