Hi mate. Now this is a question Ive looked into myself.
When I bought my PS, it was outputting 10.8-9'ish as standard but it was lovely. Which I was a abit surprised about. On raking through the forums, and the AA owners club, I find that 'most' Pro Sports are sent out of the factory on the lower end of the scale power wise. A chap I spoke to who even rang Air Arms about it, saying that he and his 3 mates bought Pro Sports, none of which sent a pellet out at any more than 9.5, and they told him that the rifle are set that way from the very start. Its due to the Pro Sports liquidy smooth fi