Thread: pellet size
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Old 19th June 2015, 09:54 AM
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Phil Gee
Join Date: Dec 2008
Member of: Millride
Location: Pelsall, West Mids
Posts: 675

As people have said, the quoted head size usually bears no resemblence to the actual size of the pellet.

Obviously, when the die is made, it is made to minimum size to allow for wear during the manufacturing cycle, and it is used until it starts making pellets oversize.
If, for example, the die makes a million pellets per re-sink, then I suspect they call the first 300k 4.51s, the middle 400k 4.52s and the last 300k 4.53s, to reflect the general increase in pellet size as it is made from a progressively larger die.
However, shrinkage rates, variations in the parameters of the lead (such as hardness and its constituents), ambient temperature, natural variation etc mean that you could well get a "4.51" pellet that is actually bigger in size than a "4.53"
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