Again, it depended on the pattern. Prior to short oil rule in early 80s carry down was brutal on flat patterns. Oil went off the heads and down lane quickly. Lane men flooded the heads and stripped the back end more frequently to preserve back end reaction, but it actually worsened carrydown on urethane and synthetic finishes. Short oil rule allowed lanemen to put no oil outside which helped the carrydown problem. Shot actually got better as oil carried down the middle, but none was their to carry down outside.
I bowled tournaments on flatter patterns where we had unlimited swing during warmups and were literally pointing it up off the gutter by midway through the second game.