I do not think you will see much difference between brands in the expansion of the 20 grainers. They are all "harder" than the 17 grainers, and pretty much the same from what I have seen.

My 93R17FV shoots the Federal Premium 17gr V-Max better than anything else. 3 shot groups at 50 yards average 3/8-1/2", with several of 5/16". Have not shot groups at 100 yards since 40-70 yards is where it is used.

I took an allen wrench to the range with me and shot 3 shot groups at different torque settings. If I was to guess I would say I have 12-14 inch pounds on the front screw and 5-6 on the rear screw. I do not bother with a torque wrench, since I want them set for whatever yields best accuracy. Neither are what one would call tight. I think Savage recommends 18 front and 9 rear.