Well, some folks do not want to put a scope on a rifle with a rail and a set of massive rings with all those sharp angles and unnecessary metal. The Seekins rings I have seen would look very out of place on quite a few of my hunting rifles, and mounting a rail on a pre-64 M70 or a sleek 98 Mauser should be justification for physical violence.
Does anyone here ever buy only firearms on which they have to do no tinkering to get them the way they want them to be. Building a rifle seems to be somewhat in the category of tinkering to get things right.
The brands you mentioned may work very well for your application on your rifles, but there are quite a few different types of rifles for quite a few different application. I have rifles for several different applications and use the rings and bases that are appropriate for those application. I use the one piece bases with integral bottom rings when I want to mount a scope on the rail of an AR type rifle. Most of these have required very little if any lapping. I suppose the OP could use these types of mounts on his bolt action rifle since he indicated it has a rail on it. I am partial to the
Leupold dual dovetail bases and rings when I want to put a scope on one of my bolt action hunting rifles. I have QD mounts on my 375 H&H so I can use the open sights if conditions call for them.
Most of the bases and rings offered by Seekin/Vortex seem to be used with rails. That is great if your rifle has a rail. Many rifles do not. I did see a one piece base with integral lower rings offered by Vortex for a M700, but one piece bases can be a real pain when you try to load bolt action rifles. They do not leave much room for fingers. Been there, done that, do not want to do that again.
I am a firm believer in getting the right equipment for each specific application and making sure everything is as right as I can make it.