How long would you expect an air gun spring to last, retain the power it was designed for and stay the course in consistent fps at the given power you were after ?

25, 50 or a 100,00 shots, it's a bit like Animal spring farm, not all springs are equal.

Given there are lots of OEM replacement springs but only a few after market ones.

Which springs do you rate ?

This would give a good idea of who goes the extra mile and take's their time to spec their springs.

I probably should have done another thread to cover this, I just don't like to bounce one thread off another's idea.