Thanks scottishkat. I "bit the bullet" and ordered a McMillan stock and hope to have it up and running for the Fallow deer rut next April.
It's interesting that so many others are finding such improvements in accuracy by a change of primers. I found that by switching from Rem 9 1/2
LR to Fed 210M my groups shrunk from 1.4" to 3/4 . . same everything else. With such a full case, the mag primers may have merit perhaps!

John