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Rifles, Reloading, Optics, Equipment
Reloading
Too early to do load developement?
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<blockquote data-quote="J E Custom" data-source="post: 1908857" data-attributes="member: 2736"><p>There are so many opinions on velocity changes that I decided to do a test that would actually show real world results. I have since done many this way and some valuable information was gained from the test.</p><p></p><p>This is just one of the test with results and since then I have fire formed over 100 rounds in this rifle and the velocity has remained within 10 ft/sec once break in is done. The fire formed AI cases have retained this 10 ft/sec average difference even though the load is over 100 ft/sec faster and rifle has over 200 rounds through it including the fire forming loads. SD's have been 3 to 5 for 5 shot strings of this load.</p><p></p><p>What this test has showed, is the quality of the different barrels by the speed that they break in and settle down from the very first shot to the point they level out. The longer the break in takes, the longer it takes to reach it's peak velocity. Some barrels and loads showed lower spreads in the total difference from the first to the break in completion. So the comparison has to/must be made with the same load and condition of the case. (Fire forming, or formed). any change will void/skew the results.</p><p></p><p>I have not done a factory barrel yet but intend to the first one that I break in. I don't expect a lot from factory barrel because in the past they never seem to break in.</p><p></p><p><a href="https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/page-2" target="_blank">https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/page-2</a> </p><p></p><p>post #20 has the details of this test if anyone is interested, and has led me to begin working up loads once brake in is finished to speed up the process and so far I have been able find accurate loads within 20 or 30 rounds.</p><p></p><p>So far it has been very predictable.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1908857, member: 2736"] There are so many opinions on velocity changes that I decided to do a test that would actually show real world results. I have since done many this way and some valuable information was gained from the test. This is just one of the test with results and since then I have fire formed over 100 rounds in this rifle and the velocity has remained within 10 ft/sec once break in is done. The fire formed AI cases have retained this 10 ft/sec average difference even though the load is over 100 ft/sec faster and rifle has over 200 rounds through it including the fire forming loads. SD's have been 3 to 5 for 5 shot strings of this load. What this test has showed, is the quality of the different barrels by the speed that they break in and settle down from the very first shot to the point they level out. The longer the break in takes, the longer it takes to reach it's peak velocity. Some barrels and loads showed lower spreads in the total difference from the first to the break in completion. So the comparison has to/must be made with the same load and condition of the case. (Fire forming, or formed). any change will void/skew the results. I have not done a factory barrel yet but intend to the first one that I break in. I don't expect a lot from factory barrel because in the past they never seem to break in. [URL]https://www.longrangehunting.com/threads/new-barrel-break-in-and-cleaning-methods.160450/page-2[/URL] post #20 has the details of this test if anyone is interested, and has led me to begin working up loads once brake in is finished to speed up the process and so far I have been able find accurate loads within 20 or 30 rounds. So far it has been very predictable. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Too early to do load developement?
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