I bought a P09 recently, and it had a really rough trigger, so immediately ordered the CGW Pro package (especially knowing how much it improved my P07). Unfortunately there was a minor packing issue and I got a .220” diameter roller bearing instead of the .230 I ordered (my stock roller is .230”). Of course CGW immediately made things right and shipped a replacement.
So I set that one aside and used a spare .220 roller bearing I had. The gun would not reliably fire in double action. I would pin the trigger all the way back and the hammer would not drop.
Then I installed the replacement .230” roller when I received it. Night and day difference. The double action is smoother and works every time. Amazing what a difference 1/100” of an inch makes.
Edit: Now this has my mind spinning. My P07 stock roller bearing had a diameter of .223 and I was told to order a .220 replacement. Is a .225 or .230 a better choice? Is more always better when it comes to roller bearings?
