This is all internet guesstimation so just take it for as worthless as it is.
1.you admitted that you changed out springs in the gun from stock.
2.you used the gun in competitions
3.you state that 95% were 38 special rounds but are'nt you required that you shoot 357 in your steel match competitions?
3.your round count goes to 50,000-so Ruger is looking at 50,000 round (probably plus because you cannot say what the round count actually is within 25,000 rounds!) used handgun that they must think have been fired using hot loaded 357 rounds all it's life.
4.There is probably enough wear in the gun so that Ruger's gunsmiths concur that it is not safe for them to fix for you- hence.
5.They told all this to Ruger's corporate arm and through it's lawyers,the only thing they could do for you on this well used revolver is offer you a great deal on another revolver you can wear out in a decade of competition shooting.
Bottom line-the gun is worn out-you wore it out-you enjoyed wearing it out and now you can get a great deal on another Ruger revolver that will serve you well that you can again-wear out.
I drive a Toyota that has 220,000 miles on it that I have run the 'stink' out of everyday for 11 years-will Toyota give me a new motor and transmission if I turn it in and say it's worn out?
Heck,they won't give me a half price deal on a new one (PLEASE?Toyota?
)
Take the deal or don't-that's all you are going to get from Ruger.
Normal wear through extensive use is not covered by any warranty anywhere-especially when any competition with the item concerned is revealed to have been done.