I have a PM tube (and several other aftermarket tubes) and I would say to save your money. The choke is only one part of the puzzle and will not magically make your gun better.
If you really want to be able to make long consistent shots you need to plan on spending time to work out what load and what tube work best with what gun. I tried 5 different tubes (lot of friends and we swapped tubes around) and 13 different loads until I found what performed best in that gun. With a different gun, the same load and tube were crap. My SBEI has an original PM and shoots very consistent patterns out to 65 yards with either Federal 3" 1 1/4oz #2, or Hevi-Metal #2. If I change the speed or size shot the patterns fail. My Baikal works best with a Kicks High Flyer tube, but it likes smaller shot. All of this took a lot of time and effort to determine.
Once you know for a fact that your gun will shoot a consistent pattern at a longer yardage, and you are using a shot that still carries enough energy to get the job done at that longer range, then you actually need to practice at those ranges. On trap fields the longest station is 27 yards from the trap house - which means you will probably be seeing the target at 35 yards and shooting around 40. If the trap range will let you, step back another 10 yard and shoot a full round. You will probably not do very well at first, but you will start to see the sort of lead needed to hit targets at long range.