I had the same issue with Win 231 in .38 Special, I couldn't get it up to power factor.
I thought my chrono was off
I finally switched to Clays in .38 Short Colt.
I DO own a 929 and it was virtually impossible to shoot factory 9mm ammo. I was getting light strikes and pulled bullets.
Most factory 9mm is not crimped, so bullet creep and pull was a real problem for me.
Since I had to reload, I went back to my 627 since I was already loading for that.
I'm not sure I'm following you. I run a .250 SDM Super Sights fiber optic front sight
http://www.sdmfabricating.com/Super_Sights.html
It's got a bigger fiber optic than a Dawson.
I bought a few of them from Bowen, and I'm glad I did.
I also bought a few SDM Super Sights fiber optic front sights, and a few Wiegand rear blades.
When I die, my grandkids will inherit my fortune
Wiegand is out too https://www.jackweigand.com/interfs.html
I would think anybody with the tools to cut the barrel could make you one. It's not that complex of a part.
Sure, Angeles Shooting ranges is half way between us. Pick a day and we'll chrono some loads.
I'm retired, so I'm only free on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday
Just keep cramming in powder, you'll get there.