Marked improvement and better accuracy is the likely result when re-fitting or replacing a barrel on the Model 504 Remington 22 Target rifle. This rifle is capable of extreme accuracy with a few improvements, most notably installing of custom barrel with a more precise fit at the barrel to receiver junction.
by Norman E. Johnson
The barrel on the Model 504 Remington is attached to the receiver via a joint that clamps a very thick split receiver ring around the barrel. This joint is tightened by a single size 10-32 socket head screw resulting in extreme thread stress if the barrel/receiver joint requires much take up. An apparent problem stems from the barrel shank being too small for the receiver hole. The bore on the unclamped open receiver is 0.6750-inch and the factory barrel shank diameter is 0.6690-inch on several of the rifles I have worked with.