Ronin
My friend has a Nesika that I am able to compare the Timberwolf to, they are both excellent actions and I would be completely satisfied with either. Having said that I like the Timberwolf more, the action is a bit beafier and it's bedding system is awesome. With the integral scope base it is a fair arguement to say the Timberwolf is a stiffer action. In addition the bolt system on the T-wolf appears to be designed more for field use.
I shot 89.8-91 grains of RL 25, the temperature was 97 degrees, The extreme spread was 20 fps for all shots, the accuracy was very good. I was only able to shot the loads at 100 yards instead of the planned 300 yards (ignorant rangemaster). All of the primers were pretty badly cratered, so I am going to try 88-90 grains next time out. I think I could get 2850-2880 fps without the bolt sticking at all.
These velocities are from memory, I will post the rest of the velocities later.
89.8 2897 fps
91 grains 2910 fps
The Retumbo was also very accurate but the velocities were a bit slower. I loaded up from 91-94 grains.
91 grains 2750 fps
94 grains 2840 fps
I will post the rest of the load data later.