I recently picked up what appeared to be a Model 600 in .243 caliber. After I actually studied it I looked at the obvious - the model number stamped on the receiver, it was stamped 660. However, I was duped by the following facts: It had a 600 stock(no black tips or caps), vent rib, polished bolt. The bolt and receiver serial numbers matched (900XX). I have contacted Remington, and they are little help regarding historical information. I talked to two different people at two different times and got two different answers. One said they made a few 660's with vent ribs, polished bolts, and the serial numbers were of the same block, the other said that the 660 was never manufactured with a vent rib, etc. Does any one know with conviction if any 660's were made with a vent rib, etc, or of 600's being mis-stamped?
Thanks