It has been a while, but I have owned three model 41's. All were made before 1990, I just never checked dates back then. I just put one on lay-a-way. All three previous guns were ammo sensitive. No CCI Standard Velocity back then. I HAD to use Remington target ammo. Not sure why, but the Remington worked perfectly in all three of those guns. Shot good too. Guns all had to be kept pretty clean, especially the bolt face and chamber area.

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Good Shootin!!