Unless you run into a batch of soft bullets that lead the barrel I wouldn't worry about it. Just give it a look after every match and shoot it.
I clean the barrels on my Open ,Limited and Single Stack STI's before every match.
Unless you run into a batch of soft bullets that lead the barrel
What about green moly-coated bullets
To be fair that barrel was messed up before I got the gun and I'm looking for replacement for it. Those bullets also leaded my main gun but not any where as bad, so I will have to try them in the bottomfeeder some day.
I appreciate the help. I had one guy tell me if I shoot lead (which I do for competition) to just shoot some FMJ's to clean out the barrel afterwards.