If it quickly gets copper fouling, but shoots well, I would leave it alone. Since "shoots well" seems to be our collective overall objective, I'd bear with the copper fouling if it is not adversely affecting accuracy. Frankly, I don't care what your rifle looks like, externally or internally, but if it shoots well, I'll be suitably impressed.

One of the leitmotifs one sees in many of the the posts about Savage barrels is that they tend to shoot better once fouled or at least, slightly fouled. I don't have enough experience to verify that with authority, but enough folks have discussed it that I would certainly not discount it.