I recently acquired a CPA Stevens 44 1/2 rifle in 38 55 and I'm wondering if it is allowed for long range matches. This rifle is an exact copy of the original Stevens 44 1/2 except the frame is slightly wider to accommodate larger cartridges such as the 45 70. Most of the parts are interchangeable with the original Stevens 44 1/2.   The handbook says:   "Single Shot and Buffalo Single Shot firearms must be originals or replicas of single shot rifles manufactured during the period from app