I just never clean the bores on my rifles and they all shoot extremely well! hehehe

My 7mag Browning I have owned since I was 12 years old, I will turn 24 in 29 days or so, and I have cleaned the bore on it once, and it will put 3 shots under .5" using handloads. The rifle has around 1,000rds put thru it. It is to the point though where I think I will give it a good scrubbing, just for good measure.