From my exterior ballistics print out....
Gun..12" TC Contender
33.5 grains IMR3031
150 Nosler BT
Mean velocity 1988 fps
Standard Deviation 26.34
Mean energy 1314 ft lbs
100 yard velocity = 1816 fps
200 yard velocity = 1663 fps
100 yard energy = 1097 ft lbs
200 yard energy = 922 ft lbs
175 yard zero range
50yrds +1.80 inches
100 yrds + 3.07"
150 yrds + 1.72"
200 yrds - 2.47"
At 200 yards it shoots 3.0" 5 shot groups using a 2x LER 4 moa dot reticle scope.
Now, from a 20" tube, you can achieve 2400 fps from that bullet. You be the judge, but it should give you 300 yard max capability. Is that worth the effort to you? Again, you be the judge. I can say that in my experience, the bullet does the job. I've shot five with the contender, all under 100 yards. 3 were DRT and 2 didn't go far and with a copious blood trail from a decent exit wound. No shot stopped in the animal, no bullet recovered. I've killed 6 deer with the bullet in a .308 at 2700+ fps. All DRT. Five hogs have fallen to the .308 load, biggest was right around 200 lbs, all DRT except one that I butt shot, wound up about 40 yards from where I shot it..in my back yard. It was going away from me and I was determined it wouldn't root my yard again. That bullet shoots 0.75 MOA in the rifle. It's an accurate bullet and I know it expands at around 1800 fps, my longest shot with the Contender as I said being about 90 yards...lasered, BTW.