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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Extreme ES caused by barrel?
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<blockquote data-quote="epags" data-source="post: 2077737" data-attributes="member: 105138"><p>Are you recording the velocity of each shot? My chrono prints out a record of each shot's velocity. A lot of the posters seem to believe the first shot is different then the rest. Is that the case?</p><p> I was testing for pressure changes with virgin Lapua brass last week with my 243 Rem 700 and in my testing (four sets(varying powder loads) of 5 shots each set) I found the velocity of the third and fourth rounds were lower than the first and last. ES for all sets varied from `25 to `45. However I was not 'shooting' for a low ES but only testing for changing pressure signs.</p></blockquote><p></p>
[QUOTE="epags, post: 2077737, member: 105138"] Are you recording the velocity of each shot? My chrono prints out a record of each shot's velocity. A lot of the posters seem to believe the first shot is different then the rest. Is that the case? I was testing for pressure changes with virgin Lapua brass last week with my 243 Rem 700 and in my testing (four sets(varying powder loads) of 5 shots each set) I found the velocity of the third and fourth rounds were lower than the first and last. ES for all sets varied from `25 to `45. However I was not 'shooting' for a low ES but only testing for changing pressure signs. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Extreme ES caused by barrel?
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