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Old 12th April 2013, 07:13 AM
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Pete Dutton
Join Date: Nov 2008
Location: Rotherham
Posts: 2,646

Originally Posted by mike9965 View Post
i think the light conditions and wether conditions were playing havoc with the chrono

on the sunday my own rifle set to 800fps with 7.9s was reading 25 low
on the monday i marshalled the chrono in the afternoon

results were up and down all afternoon some were spot on in which shooters knew there set up
some were registering low 20-30 fps and that was in the same group of shooters ???
Some of the problem is how different rifles deal with the cold, some rifles are well known for dropping power upto 40fps in extreme temperatures whereas the old Daystate Mk3 used to only vary 3-4fps in extremes.
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