Everyone is different. The additional weight could have caused a slight change to your timing or mechanics that gives you better timing or better mechanics and thus, you throw the ball better and the result is your average has gone up. I know others who have dropped weight and done the same thing, even someone who went from 16 pounds to 14 pounds (skipped 15 completely).

If this is what works for you, great. I throw 16 pound right now as well because that is what works for me.

3835

I used 16lb up untill about 4 years ago. I switched because of wrist pain. I now use all 15 and have improved. Most important my wrist pain has decreased. So use what works for you. I probally would not have switched if I did'nt have the pain issue.

These 16# vs. 15# vs. 14# threads pop up as nauseam….
 
Use the heaviest weight you comfortably handle given your speed and revs. I've never known a money bowler who can comfortably and effectively use 16# intentionally drop down to 14#. A good case might be made for 15#, but lighter??
 
On the other hand, if 14# is the optimal weight for an individual based on strength and comfort, that's the right decision. It doesn't matter that others might use 15# or 16#. 
 
I used 16# equipment for a good chunk of my adult life. Due to injury, I dropped down to 15# several years ago, Now that I'm a young senior, I can see the point where I'll have to drop down to 14#. It's not because I want to, but because I'll have to for longevity. When that time comes, I'll make the best of it.

Everybody has already made the point of different stokes for different folks. I'm 47 and moved back to 16 a few years ago for timing as well.  The only negative I have seen with the move up is that the balls are less dynamic at that weight then they are at 14 & 15.  The extra pound changes the RG & Differential numbers. It's a tradeoff for the extra pound of carry and also why some folks will carry better with 15 and some will carry better with 16.