Question?
What contour are the barrels on the two that won't shoot? I use lighter weight barrel contours than most use for their LRH rifles on this Forum. Like #3 and #4 contour barrels. And I find it does take more load development than others seem to describe with their heavier contoured barrels.
But I've read quite a few Kirby Allen posts, and his experiences with the customs coming out of his shop is similar to your expectations. Very little load development necessary to get the heavier barreled customs to shoot 1/2 moa or less. Often, he reports that the first load he tries will demonstrate 1/2 moa accuracy.
Trying to get 1/4 moa? I think that might require some more load development.
But with the efforts you've described invested in the 300 WSM already (even if it's got a lighter weight contour), I would be sending that one back to the smith, and asking him to demonstrate better accuracy. And to consider the possibility of something gone awry. Just my thoughts.
+1
I find the same thing . Lighter barrels require more load develoupment most of the time than
heaver barrels. This does not mean that light barrels won't shoot, just that they are more sensitive
to Bullet weight and re loader componants.
It is a shame that a build goes bad but it does happen . I personally have had one that I would not
give up on and had loaded over 300 different loads. (Hard Headed) trying to come up with something
exceptable.
After taking it apart, I discovered what was wrong. It had a bad barrel and a terrible fluting Job.
I changed barrels and blueprinted the action my self and now it is one of the best shooters I have.
I To recomend that you let the smith have a chance to make it right and put a new barrel on it
because most barrel makers are interested in the quality and reputation of there barrels and
will work with him to fix your rifle.(If he sends the barrel back, they will test it and if it got
through quality control out of spec. they will replace it at no cost to the Smith.
One observation though that might help you is = If the rifle is stringing vertical or horizontal
it may not be the barrel. Most of the time it if bedding or trigger control.
If a barrel shoots loose groups in a round pattern It is bullet related or a poor quality barrel.
Again; sorry you are having this trouble.
J E CUSTOM