what would be the best action for casting and retrieving big 1oz+ lures?

Big 1 ounce lures?

A whole ounce for a swimbait is pretty f'n light. I'll take that one as a joke, though. Haha. Anywho, when fishing swimbaits, the key is slow. Slow and steady.

Sorry fisherman andee, you've ruined the question for me.

EDIT:

You forgot hollow-body swimbaits, by the way.

A big 1 oz lure? Well thats about your average lure size but ok. Anyway it depends what lure. What type is it? Spinnerbait crankbait? Swimbait? What?

Edit:All right well let me cover all swimbaits for your knowledge or the 3 basic types.

Hard body-These look like trout,bass,perch,bluegill whatever (usually) typically a slow retrieve

or deadsticking is used.

Soft body-These are the ones that have those plastic tails. Just reel a steady retrieve or put em on a swimjig.

Ughh well nevermind guess there is only two. Well there you go thats a general rule. Not all swimbaits are the same though.

Google "How to use a swimbait" There are no end of sites giving instruction

It is not too important how you retrieve them. Just be sure to vary your retrieve so that it is presented like a live bait would be.