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.
I load .38 Short Colt. However when I set up my powder measure I drop three charges into a .357 shell, and take the average.
I'm using a Dillon 750 with a bullet feeder and a case feeder. I check my powder charge every 1000 our so shells. It never changes.
I also check my powder charge when a change to a new bottle of the same powder.
I can't speak for you, but I'm shooting .38 Short Colt in a gun designed for .357 magnums.
When I first started shooting .38 Short Colt someone told me to start with 9mm load data, and work up from there.
Except I couldn't find any 9mm load data for heavy 160gn bullets, and even when I loaded lighter bullets they didn't give me the fps I needed due to the barrel gap in my revo vs a semi auto no barrel gap.
I actually started with .38 special, but couldn't get it anywhere near minor with the powders I had on hand.
When you find a powder you like, buy an 8 pound jug if you can find it, maybe two.
Same thing with primers, buy 10,000 if you can find them. Winchester small pistol primers are available at Target Sports USA. Federal seem to be trickling in slowly.
I load Bayou Bullets 160gr RN to 1.2 with 3 grains of Clays. I use a .357 sizer die, then a 9mm seating die and a 9mm crimp die.
I found Titegroup to be way too dirty in my revo.
Name: .38 Short Colt: 160gr Bayou.RN: Clays 3.0gr: Starline Case: OAL 1.2
Notes: S&W 627
Shots: 3
Average: 789 ft/s
SD: 4 ft/s
Min: 784 ft/s
Max: 793 ft/s
Spread: 9 ft/s
Power Factor Average: 126
Power Factor Low: 125
Power Factor High: 126
Barometric Pressure: 30 in Hg
Temperature: 63 F
Weight: 160.0 gr.
Powder/Wt: Clays/3.0gr
Bullet/Wt: Bayou 160gr RN
Primer: Fed SPP
Case: Starline
OAL: 1.2
Gun: S&W 627