We must be always aware that we are dealing with sub-calibres. They are a law unto themselves. Witness my old .17AB for example, using Re#7, lot # 2500 - worked up from 2 gr. below the top load, went 3,940fps with 25gr. HP's.
: My new .17AckBee, when using some 3,800fps fireform loads, locked it up and went 4,150fps instead of 3,800fps.
They are to be respected for sure
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: Gives me the willies every time a new shooter wants info on building up a wildcat along with loads he should use, and he hasn't loaded anything.