As I have never done this before (I need to buy one yet) can someone tell me the ins & outs of what I need to do/know? Should I use a heavey pellet or a light one to do the test? what is a a good & reasonably priced chrono ? I read that thread last night about the lad who had his rifle crushed because it was 12.09ft Ibs by the police (seemed very unfair to me) & it was only 6 weeks old £600 gun gone just like that. Want to get mine checked out to make sure I don't lose any of them. What is a good power level eg. 10.5 11.5 or lower as I have also heard that warm weather can put up the power as well. Any advice will be welcome.