Jerry Kiln
On the lighter mainspring,
Thursday, September 17, 2026, 10:26

ideally I'd think you'd grind and polish a lengthwise thickness taper, always working lengthwise to run with the grain, and ditto as for polishing sides, from an engineering standpoint of stress-risers.

However, on my Colts, I was lazy and only bought replacement springs, very much liking the Heinie for durability. As for mainsprings, I tried Wolff but really am mistrustful of a slot cut down the middle, especially if anything akilter and one side gets more stress than the other.

So, instead, I used Lee's Gunsmithing mainspring with its narrowed midsection, and never had a lick of trouble with one. I don't see their kit for the SAA currently listed on their site (maybe out of stock? out of production? I'm blind?), but Longhunter lists it in stock...
https://www.longhunt.com/storelh/index.php?route=product/product&path=88_89&pro...