Does the tighter tolerance just make them cycle smoother? I've never had a problem with the slopiness of the stock bolts? I get the cool factor of an aftermarket bolt I have just never come across an reason to be upset with the stock. How do the tighter tolerances effect the ability to cycle in wet, cold, dusty environments?
I completely understand the cool factor of all the aftermarket stuff but plenty of animals have been taken at long ranges with completely stock rifle components that have had a miniscule amount of tuning done. Bedding, good cleaning and proper lube plus a trigger job will do wonders for many stock rifles.
I've said it before I frankensteined together a Remington 700 ADL action, a 700 SPS bolt and a who knows what stainless barrel and the gun shoots under one MOA out to 600 yards. Yes the words on my barrel are upside down but I could careless I have not read them since the day I received the barrel. My gun is as far from cool and custom as you can get, raggedy anne would be a good name for it but it works.