Just wanted to run a question on bore cleaning by this fine panel of experts. To start with, several of the shooters at the range had been telling me that they only cleaned their bores after 150 to 200 rounds. Some of those being normally quite reliable in their knowledge. I have always been sort of keep it clean oriented--not a clean freak--but not let it get real dirty. Anyway, I decided to try what they were telling me and all went well for a while. I am supposing that I had approached 100 rounds through my M700 Mil Spec 5R .300 WM when all of a sudden it quit shooting those tight groups. I have been making loads with different bullets, powders etc. to find the most accurate load for the rifle for hunting purposes. I was getting some very good 100 yard groups with the Berger 168 gr. Hunting VLDs and H 1000 in the range of 1/2 MOA then the groups got bigger and bigger and it wouldn't group the Accubonds hardly at all. I sat and thought here I am burning up expensive powder, primers and shooting these costly bullets and all has been wasted. My sons M700 .30-06 was also giving a problem earlier of similar nature and I got to work cleaning it and thought I would never get all the copper out, but now it shoots like a champ. So I thought that could be the culprit. It was exactly what I expected. Took me a day and a half to get it all out of the .300. I took it back the next day, fired a couple of fouling shots and it was right back in the groove. Needless to say, I have settled on my best load and will not be shooting it as much. I may fire up to 10 or 15 rounds on Wednesdays when we open up the long range section. I have thought that I would go back to my old method of cleaning the bores after each session at the range. Is that too much or am I on the right track. How many rounds or how often do you fine shooters clean your bores?