Sorry I don't know anyone with a 25wssm AR but I do have a friend that has a browning bolt action in one. Very accurate and powerful cartridge, much like a 25-06.
All I can say is stay away from the winchester 120gr hp (positive expansion point?) if you aim for the shoulders. We were all hunting together opening morning several years ago and he shot a nice buck directly in the shoulder. The deer dropped at the shot, a few moments later he was back up on his feet running. There was no blood so tracking was hopeless, several of us looked for almost an hour anyway. We did find the deer later with the help of the buzzards, it appeared to be a perfectly placed shot just no penitration into the vitals. Either the bullet deflected or just came a part who knows but I wouldn't use em again.
I would use nothing but 110gr accubonds if your gun will handle the length and shot them well.
