They made a few mentions that they cleaned when their "standard ammo" went out of bounds, but like I mentioned they stayed vague on specifics.
I always cleaned my SR rig at the end of a day, even if I was going to shoot more the next day. It was just too easy to stay out of trouble with the bbl, but also with the BCG and trigger. When I used to compete in silhouette, I would test to the limits, then clean with margin to that limit. I never hit the limit with my SR rigs cause I am usually too tired after practicing to want that problem.
A SR Club match was at least 88 rounds so going two cycles would be no less than 176 rounds. With rapids and environment, I never bothered to push the rig to failure just because it was too easy to clean and lube at the end of a day and not worry. I don't even check the barrel till it goes over 2500 rounds.
My theory on the reason performance drops on the 300 rapids before the 600, are two fold.
One is I am far better at sling-prone than I am at 200 sitting rapid, and so I would see the problem with more confidence than 200. I can just hold sling-prone tighter, so my detection level is lower. I might not find that problem at 200 just cause I can't hold that tight sitting.
The second dimension to the issue is the heat build up. It will usually be the second string that shows the problem because the bbl is already hot, and then we hit it with more rapids. The cadence is based on 60 to 70 seconds, versus I usually take 13 to 14 minutes on the 600 yard line, so the bbl temp stays much lower. The gun gets hot enough during the second 300 rapid string that the group can open up but when kept cooler will still go several hundred more rounds while holding inside the X when shot slowly.
