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Old 3rd May 2016, 06:02 AM
blueboy blueboy is offline
Senior Member
Join Date: Jan 2014
Member of: Millride F T C
Location: Hednesford
Posts: 109
Default GP barrel

Cheers Jon and Neale, Jon can you ask Neale what maths calculations he used to work out
D D D D D D I hope I did not miss one out.

The mark 3 did have a smaller diameter barrel than the later ones.
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