get a f1 mate for £70 as you can put it at your point of impact to test the finishing ft/ibs at the target..and you can save 30 shots to see how consistent your rifle is and its variation, you can also us it on pc..
there he best, them cb brake after a year using springer and gas ram but if your using strictly pcp in the garden there fine, if you want a real gooden get a f1