Recently acquired a Brocock Atomic XR .177. Really wanted a .22 as all my other PCP's are .22, but they were out of stock. In hind sight, I should have waited or bought the Pathfinder in .22. Is changing the caliber on the Atomic XR a practical task, or should I just sell it? I can't seem to find any info online as to if a caliber change is even possible.