Jamie:

I decided a long time ago to leave the mainspring as it is & live with the trigger. I'm sure today that a repacement would be fairly easy to come by; when I made the PG, such parts were rare. I may look for a spare at Numrich & thin it but I'll leave the original as is. In the four years I was in college, I put 5,000+ rounds through it & perhaps only another 1,500-2,000 rounds since then. I'm amazed the spring is still OK; first class workmanship! That & all the pins & mating surfaces are still solid with no discernable wear. Not bad for an action that dates from 1870!