I can shoot through 3/4 plywood with my 25 calibers tuned to mid to upper 40s fpe. But you basically cannot get that fpe out of a gamo redfire. I think it weighs 15.4 grains and even at 1000 fps it would only produce about 34 fpe. My P35-22 gets to 32 fpe with it's preferred 21 grain pellet and it will only shoot through 1/2 inch of plywood. 22 will penetrate a bit better than a 25 caliber but 1000 fps is not very practical for a pellet either. If 32 won't even get close, 34 isn't going to make it.
I don't test in solid wood because it is so variable. If you shoot near a knot pine can be very hard. Away from a knot, it is probably similar to plywood which is, after all, made primarily or totally of softwood. I have a test block I shoot made of 1/4 inch layers of mdf glued together. MDF and plywood give similar results but mdf is more consistent than plywood (and cheaper). But I also shoot scraps of 3/4 plywood sometimes. Even at 49 fpe pellets tend to make it through by blasting part of the last layer of plywood away, they do not typically make a hole through all the layers. That would not change with solid wood, it will tend to split if you hit it hard enough.
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I started not aiming at the same spot after this, bolts aren't cheap!
