I have a Remington 700 PSS in .243 bought second hand 10 years or so has developed a habit of firing the first cold round about 6 inches left, then returning to sub 1 inch for next shots. I took it to Callum Ferguson, Precision Rifle Services who had a look though the rifle with camera which identified some rust spots which he advised was the probable cause of the stray shots. His solution was to either re-barrel or get a new rifle. If I went to him for the work the cost would be similar for a new barrel or a new rifle (factory specification) depending on which barrel and rifle you looked at. So the action and synthetic stock are both Remington and the trigger is Jewel, If you had £500 - £1000 to spend would you get Callum to replace the barrel or get a new Tikka, Sako or something similar? Which would be the most accurate?