I have or have had several 5R barrels. 2 Rocks, 2 Bartleins. One Krieger I'm waiting on, 1 Obermeyer here but unchambered.
I also have a 5 groove Pac Nor.
I also have a 4 groove traditional Brux. And a rimfire Shilen. And a Lilja here chambered but not screwed into a receiver.
I can't tell a difference between any of the accuracy or cleaning between any of the above. Some are better barrels than others, the Brux and one of the old Rocks being very very good. But one is a 6 BR and one a 25-06, both chamberings known for good accuracy.
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Is a 5R Remington the real deal? That's a different question. The 5R Remingtons I've seen (never owned one) looked like quality construction, good stock, heavy-ish barrel screwed on right. It's hard to tell if they are more accurate because of the barrel or because Remington decided to put it together with a little extra attention.
