Updating the mounting of scope on my new rifle:I managed to get someRWS 162 grain cone points and they shot well,somewhere between 1.5" to 2.5".However I have had a few problemswhich thankfully seem to have settled down. A) It is absolutely imperative that BOTH the two jackscrews are strong and firm against the left (adjustable) barrel.If this is not done the group varies.It can be deceptive in that there is some take-up before theindividual screw is firm.Then check the other one again.I got caught out on this. B)I had a good deal of copper build upin the new barrels.It was a devil of a job getting it out.The only solvent which worked was Sweets which has ammonia in it.I was reluctant to use this as it can etch steel so I had to be careful(I should note that the copper was there after regulation by the factory) C)Aafter about100 shots-50 each barrel-the copper build up is less of a problem.The tendancy to build up is reduced.Im told that new barrels have to be shot in ,whatever that means. D)Two other variables which seem tobe now reduced in significanceare 1)group variation betwwen hot and cold barrels 2)group variation between clean and fouled barrels I would suppose this is because the barrels are shootng in,as they say.Or perhaps I am now familiar with the rifle and shoot it better. Generallythough I am well pleased as the rifle a trim ,light little mistress and Im madly in love. REGARDS Hubert