Time for an update
I never could get comfortable with the McMillan A1-3 in prone, all other positions it is fine.
Yesterday a new stock arrived which feels very good in prone and I think it will be OK to shot of hunting tower or similar to.
I havent tested the stock yet since my Leupold is in for service, the reticle was canted to the right in it... I hope to get it back within 2 weeks...
(We have a Swedish Leupold service center so shipping is no time)