I usually reserve the heavier beaded flies for deeper water and try to limit my fishing of them. But I will use a copper wire weighed fly or heavier hook fly with stiff hackle in high gradient water. I find a heavier bead will often get hung up unless you tight line it and tight lining can often be pulling the fly out of the zone. I will put a lot of slack in my presentation, and the current will grab hold of the fly and really deliver it naturally to where the fish hold. I feel it is equally effective as beads, but really reduces the risk of catching bottom and requires a lot more lost and found in presentation. Something alternate to try. This is not textbook but rather a presentation that I have done since I was a teen drifting garden worms to trout. The water is a vehicle for presentation. It naturally lifts the fly around obstructions, where a bead will always settle on the bottom.
The American Beauty plastic bag scene comes to mind as a best illustration of the method. This inanimate bag becomes alive in the medium of air. The same applies to our flies in water. If the bag were attached to a line it would not move naturally…it would be a mechanical arc. If you introduce slack, your fly will dance in the eddies and micro eddies, just like most of the forage the trout are keyed in on. It will also deliver your fly in nooks you would never be able to reach with a tight line. I will periodically pulse the fly to check for a fish. It works really well. It is my favorite presentation.