I waited until today to reply to this topic, waiting to see what others have said. Here is my experience.
Several years ago ( 15 to be exact ), I went from 16lb to 15lb when I switched to a full resin compliment of equipment. The resin hit so hard that I noticed no difference after I got used to the reaction, averaging just as much, if not more, than before. Then, I hurt my wrist at work.
A friend had a 14lb AMF XS (yes, the white ball), so I traded for it to see if I could throw 14's and if they would strike. Soon, my average actually went up because I was more accurate with the 14's than before. The 14lb balls also seemed to hit plenty hard enough, and the only difference I could tell was on "off" hits where I had thrown a ball that shouldn't have struck anyway.
After a year or so, I went back up to 15lb equipment, why I don't know ( I think it was because it was easier to find used 15lb balls than 14lb balls), but my average never changed.
This year, I have made the decision to go back down to 14lb equipment. I can generate more ball speed naturally with the lighter weight balls, and that is what the strong resin balls like with my release strength.
I've shot one 300 game and lots of high 700 series with 14lb equipment and wouldn't go back to them if I had any doubts, because I don't have to this time, I am choosing to.
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