What @bulldog1935 said is correct; your best distance is with specialized equipment and heavy, aerodynamic lures. The flip side of this is that trying for that much distance with normal, usable bass fishing gear and regular lures will be fruitless. You mentioned "spinning lures". If you mean in-line spinners, the heavy Worden's Roostertails are the only ones I know that will go a good distance. And they have problems of their own.
If you want to use Mepps-style or Panther Martin style lures, you can get distance ...... up to a point. A soaked Musky Killer might surpass 50 yards, but then again it might not. So much depends on your rod, your reel and your line. If you had the 7'-06" St. Croix Mojo Yak in MH/F with a 4000-size reel and the thinnest braid that you can buy that will tolerate the launch, I would say you'd be at the max for regular equipment.
OTOH, if by "spinners", you mean spinnerbaits, then you've got a hard row to hoe. Spinnerbaits have a LOT of air resistance.
Like a lot of new members here, you haven't told us where you are. It makes a lot of difference. If you're in a place where there are distance casting competitions, you've got a gold mine of info that you can tap into. You don't need to wait for Tommy Farmer to come around; most any of the competitors can give you lots of good advice.
Surfcasters are the same way; lots of advice, and lots of demonstrations.
These people might not be bass fishermen, but the knowledge they have can translate into a great advantage for you in regular bass fishing.
Hope this has been helpful! jj
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