The "1871" model generally uses one of two locking mechanisms:
: Test the new code at least three times while the door is still open to ensure it works before locking. JustAnswer How To Dial A Combination Lock On Your Safe 23 Nov 2023 — field and stream 1871 gun safe manual
The key is not fully inserted, or the lock cylinder is misaligned. Solution: The "1871" model generally uses one of two