Only 1 guy on here has had an issue with his 220f misfiring. The problem ended up being that the tip of the firing pin was broken off so it wasnt hitting the primer hard enough. Some ammo would still light though.
After figuring this out Savage sent him a call tag, he returned the rifle, and Savage repaired it quickly and returned it. He has no further issues.
That is the only one I have heard about though. Mine work flawlessly. This year I fired it 4 times in the field, and killed 4 deer!
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