I thought the XP-100 and Remington 600, 600 Mohawk and 660 were all based on the same action. I think the Model 7 is not quite the same, but an improved version. Certainly a better looking rifle than the 600-660 series, but I wouldn't trade my 660 off for any amount of money. It's my very lucky deer rifle. Seventeen deer with seventeen shots and no misses. The gun is ugly as sin, but beauty is as beauty does, and my 660 does.
Paul B.