BudsGunShop.com - + P Ammo ?

This should shoot heavy loads fine as Buffalo Bore heavy loads reference the Marlin Lever rifles. However, rather than risk life, limb or warranty, I would ask Winchester to be absolutely certain at Customer Service Department at: 800-333-3288.

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Hi Lewis, Yes Heavy +P Loads will be fine without issue.

as a rifle it should be fine with +p loads but I would contact Winchester and ask Customer Service Department 1 800-333-3288.

Hello Lewis, usually if a firearm is treated for hot loads (+p rounds) the item will state soo on the description. These rounds are loaded with a higher pressure that normal forged barrels cannot handle. I have spent time searching all over and can find no information strating it is safe to fire these loads. Here is a list below of buds and Winchester customer service numbers. You can even use the blue chat button and speak to a live representative at buds. They may even call Winchester for you, as they called a manufacturer for me while on chat.
Buds - 859-368-0371
Winchester - 800-333-3288
Happy shooting and happy holidays!