The only way I’ve ever found to be marginally comfortable carrying a M29 is in a cross draw holster.

I believe it was the Bianchi Cyclone model, but I got out of the 44mag business some time ago, so no longer have the holster to confirm the model designation.

I tried several shoulder holsters, but found they were miserable devices that were exquisitely uncomfortable and that impaired my motion so much that they were unusable for anything.