Swampman I simply cannot believe the total rubbish you spout at times
I really wonder if you believe half of it yourself.
The only rifle bore that does not require cleaning to maintain it properly and prolong it's working life is the .22 Rim Fire due to the special lubricant used on the bullets which leave a protective coating inside the bore. Of course it will not stop the ring of erosion that develops at the chamber mouth/leade juncture after many rounds have been fired but it does protect the bore from normal erossion from moisture.
The .22 L/R bore in this photo is what happens to rifle bores that are not cared for:-
Even though this is a rim fire this one is old enough to have been shot with not only corrosive priming but also Black Powder. Perhaps not the best photo but the bore has pitting and was like it when I brought it. The rifle was made prior to The Great War (WW1). It was this very reason that A.G. Parker & Company Limited as Parker-Hale were known at the time developed their "Parkerifling" liners to restore rifles with damaged or corroded bores. Remember that corrosive rimfire ammunition was still being produced and sold at least up until 1939 if not later still.
Mr A.T.C. Hale developed this just after the end of the 2nd Boer War so about 1903.
I have seen many rifles with damage caused by lack of care and maintenance one particular rifle looked quite good until it was cleaned to remove the build up of fouling. The owner subscribed to your thinking and thus the bore was pitted under the fouling. Moisture creeps in and then gets to work.
I saw a fine Sauer model 202 that wouldn't group well a thorough cleaning revealed a rusted spot in the bore. A friend who works in a gun shop where a rather nice looking Heym bolt action rifle was brought in as it had lost the ability to group it's shots found the bore so furred up with rust that he needed a mallet to drive the rod with brush attached trough the bore. The barrel was scrap. Seems the owner went on a trip to Europe Boar shooting in the snow and mist then just put the rifle in it's case and came home then put the still cased rifle in the cabinet where it sat for a month or two result one scrapped barrel and a hefty bill for repair.
If the owner have wiped the rifle down and cleaned it on returning home the bore would most likely have been fine.
Now as for this:-
[size=0px]Not the same group, it measured 1/2 MOA and was shot with an oiled bore to show why you should never clean a bore.[/size][/size][size=78%] [/size]
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A perfect example of how little you know. There is enough well documented evidence to show that shooting with an oiled fouled bore is risking damage to the rifle and those near to it. Barrels have burst through oil in the bore. Any oil MUST be removed before firing a rifle once again you show your total lack on knowledge and understanding of firearms and basic shooting care and safety.
God must love you for some reason to have kept you safe all these years when through ignorance or plain stupidity you repeatedly put yourself and others at risk with stunts like this.