I am not sure about the years but Remington's triggers with the keyed interlock in the shroud -- well those triggers are not easily adjusted IMO.
I believe every one of the 700's and the lone 721 I have all have triggers set to less than or equal to 2 pounds.
If you have a trigger without this keyed lock in the shroud then I don't understand why it won't adjust. I think that earschplitinloudenboomer may have hit it on the head though.
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