I had a Taipan Mutant in .22 and it was a great squirrel gun. Long range accurate and after a different moderator, quiet enough for 2nd and 3rd shots. I liked the bullpup for the sake of fast pointing compared to the long guns. I ended up selling the mutant and used an FX streamline in .177. The streamline, although accurate, lacked the knockdown and knock out power of the .22. It was accurate enough to hit them, but often it would take a couple of shots to kill them. The streamline was more quiet than the mutant and was not as fast pointing. Most of my shots were in the 30 to 40 yard range. I'm now looking for another bullpup in .22.