Bobby- If it is any consolation to your friend, a friend of mine, who is a true marksman (military reserve rifle team), tried out one of my MN 44s from
50 yards, into an 18" plastic target.
Out of ten shots from his little sand bags, he did not see where two or three even went.
There was no group, and he used his spotter scope. Even fairly shiny bores can suffer from some corrosion many years ago.
Your friend might try a barrel-stiffener, if he does not mind the price.
Those rifles were built to be very reliable. Mine has never had a ftf using 600 rds. of only Wolf/Silver Bear ammo. These are made for very short-distance fun with plastic jugs etc.