I had a go of a Raider a few years back and to be honest, I diddn't rate it. I wasn't impressed by the bolt action, I thought it felt a bit cheapish, but I was used to using the AA s200. With regards to your question about 'Knocking the power up', if you feel it lacks power, I'd advise you take the gun to a gunsmith and get it shot over a chronagraph. Is the gun second hand? If so, then maybe the seals need attention. Either way, the gunsmith will be able to put you right.
With regards to some (well, one) of the previous posts, well, I smell Airgun BBS!
Look, the bloke wants some advice