Functionality and reliability are most important to me and my customers. Ruger has proven the coil setup to be exactly that . . . so much so that Magnum Research (BFR's), Freedom Arms use it and even Uberti and Pietta use the coil hand spring in their SAA copies (their flat hand springs were usually the first to break!). So, not a "frills" thing at all, just common sense.
The bolt only needs 3-4 lbs pressure to do its job so technically you're wrong about the need for a heavy spring. That's been the "tuner" setup since the 1950s ( fast draw / fanner craze) so apparently it ISN'T the cause for throw-by . . . wasn't then, isn't now.
Except that when you change the cracked or broken hand spring, the problem goes away!!! No need to touch ANYTHING else ( that would include the bolt spring!!!) !!!
The ONLY time it could be the bolt spring is IF the bolt spring is cracked or broken.
I really don't think you understand how a bolt block is fitted so therefore you don't grasp what it actually does. Have you ever made and installed one? It minimizes bolt slop to the point that almost always the hand has to be stretched to have sufficient carry up for correct timing. Mechanical accuracy is what me and my customers expect and that exactly what they get.
So, it answers "built-in" slop so it is an answer to an existing situation before it becomes a problem.
