I have 2 barrels to "break-in" on our trip to the range, one mfg says to fire 10rnds and clean before each shot then every 2rnds, other mfg was 10rnds cleaning each shot then 15rnds cleaning every 3shots then cleaning every 5 shots, I have always heard of doing it in 5 shot groups cleaning every shot then every 2 shots then every 3 shots all this is done not allowing the barrel to get hot. I've always been scared of the "lapping" bullets, seems to me it would also mess up the throat creating more bullet jump. Does someone have something like valve grinding compound that could be used with a cleaning patch and a rod? seems like if you did that with something to save the crown or bore would save some time at the range.