I put between 40 & 50 rounds through my new 750, in 35 whelen, over the weekend. All loads were 56-59 grains of RL15 or IMR 4320 under a 225 gr. Partition or Gameking. Only cleaned the barrel a few times. The action cycled perfectly, the gun is a SOFT shooter. Some of these were getting pretty hot, none were "cold".
Next outing will be with 200 and 250 grain bullets.
56 grains of RL15 under the 225 gr. Partiton, gave me repeated 1.25" groups, some a bit better by maybe an eigth inch. I like this combination!
I should also comment that I am not a particularly great shot, so the gun might be better. I will try to get one of the steadier guys at the camp to give it a try.