All of them until you get to the RUM and 30-378, Lapua etc. Call me a wimp.
Most favorite, 308 and 300 WM just because I have used those two more than the others.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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