I don't spend much time at the range. Just enough to sight in a scope/sights/loads. 99% of my shooting is hunting. Deer/elk/bear, and coyotes.

I do have an 1/8" drill that I use if I think it's being built up. Like you say. It doesn't take many shots for it to happen.

Just out of curiosity. I've been shooting real BP and T7 so far. So, i've just used the Remington Kleanbore primers.

As soon as the BH 209 shows up i'll be using the CCI 209m primers.

How do those two primers compare to clogging the flash channel?