I know two things about this comment.
First, I agree that there's not much demand for 70's. Most customers don't know what they can do. Most 'smiths who don't know nor even care what they can do, either.
Second, nobody's build a one hole rifle to date that's a one holer all the time. The best of them shoot cloverleafs at short range (300 and under), under half MOA at medium range (301 to 600 yards and under 2/3 MOA at long range (601 to 1000 yards). I'm not referring to the smallest groups they'll shoot which any one will do a small percentage of the time. Accuracy is what one can count on all the time and nobody's built a rifle that does that. Well, maybe they have if the target's no more than 50 to 60 yards down range.
However, if one shoots enough bullets in a target, there'll be one hole in the paper but its size may not impress folks.
Sorry Bart but you have the wrong guy building your rifles is all I can say. My sporters are built EXACTLY like my competition rifles (just not glued in and with smaller tubes) and I can go into the finite detail from exactly how the barrel is indicated in to how the dies are made (watched and helped build more than a few of them). It is possible to build guns that shoot every bit as good as they look---have watched hundreds of rifles being built over the years in my Smiths shop here and in Colorado.
The biggest part of shooting a rifle accurately is of course the rifle itself HOWEVER if one does not have the equipment, knowledge or skill to shoot it to its full potential then that is another story. For the most part when someone tells me how great a sporter will shoot I can tell to a great extent if they know what the hell they are talking about when they are in the process of putting the rifle on the rest to shoot it (really love the guys that leave the swivel on the front).
You do have a point in that some bullets will not settle completely until they get 250 to 300 yds and if the shooter is good enough to understand what is happening and proficient in his skill sets he or she will know that 80fps deviation from high to low is going to kill your group with vertical dispersion out past 750 and esp at 1K. This of course assumes the shooter is making perfect condition calls so that he knows what is going on rather than getting lucky and putting 2 or 3 close together. This is a subject that could go on forever but you get the idea.