What's important is: is your average score, over 1,000 rounds, higher with porting? You can't tell much with only 25 rounds.
You can tell whether there is a discernable difference in recoil and muzzle jump. Perhaps even more so because you are focused just on the recoil of the gun. This testing as well as owning and shooting ported guns leads me to the firm belief the technical benefits of ported barrels are over-stated. But if a shooter believes that the barrel porting is breaking more targets then the mental benefits are undeniable.
If you want to improve your scores getting your barrels ported is very, very low on the list of the things I would recommend. YMMV.