Interesting 5" Pre-27 357 Magnum

That U spring is pretty cool. This is the first time I have ever seen one or even heard of one. I've seen the W spring before, and it just seems overly complicated to manufacture.
I wonder why they didn't continue using the U spring once it was tried and found to work. It eliminates one part (rebound spring) and looks like it should work just fine.
As Arty Johnson would say...
Veeeely INTerestink!

I have read that both the W and U mainsprings tended to weaken over time and didn't rebound as well as the original slide/spring combo.
 
Richard - thank you for sharing so much in this thread. The interior view of the U-spring is great. I had heard about it but didn’t realize it served as the hammer and rebound spring simultaneously. Your cleaning procedure has been copied (and I doubt I’m alone in doing that). And I always enjoy seeing your “scratched up” treasures.

Chip
 
Just noticed this thread, late to the party as usual. 🙄
Beautiful revolver. Very interesting modifications for sure.
I have never seen that style trigger shoe, does anyone know who made them?
If you had to take out the U-shaped mainspring to clean and lube the inside would it be difficult because it holds the rebound spring also?
Again gorgeous revolver, uber cool.
 

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