This was a few years ago. I was working up a load for a Marlin in 38-55, "this Rifle was originally a 35 Rem. I sent it to Marlin and they rebarrel it to 38-55, that included a new stock, forearm, new bolt, and feed tube". Anyway, my load was a charge 28gr of BW36, basically the same as BLC2 no longer made, that I know of. The boolit was the Lee 250gr PB. The BW36 was a military reclaimed powder sold by a Company in Phoenix.
The Corno showed a Velocity of around 1500 fps. To test it I set up a laminated beam 6 inches thick and 16 inches wide by 2 ft. high. I set it up 6 feet from the garage wall I stood back about 20 feet, surely it won't shoot through that 6 inch thick laminated chunk of wood. That boolit went through it and the wall, luckily there are no homes in the direction I shot. I think it will do well on Deer or Elk. My trip to the range was very good. 3 inch 5 shot groups at a hundred yards. I guess I need to never under estimate cast boolit loads.
BTW the barrel is not a micro grove. It has regular cut rifling.