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Rifles, Reloading, Optics, Equipment
Reloading
Compressed Load?
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<blockquote data-quote="jsthntn247" data-source="post: 510622" data-attributes="member: 14894"><p>I am glad I asked this question before I just looked at Hodgdon's website and went blasting away. I have looked at two Barnes manuals, one said 76.0 grains as max and the other said 75.5. I emailed Barnes, and this is the response I got. "</p><p><span style="font-family: 'Consolas'"><span style="font-size: 12px">I just talked to the guys that shoot the data. I hope I can say this as</span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">eloquent as they put it. They said from BRM#3 to BRM#4 the entire way that </span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">they shot data changed. For BRM#3 they used to shoot a charge then measure </span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">the head stamp for expansion. For BRM#4 they used a strain gage to measure </span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">barrel expansion, which was a more accurate reading. For BRM#5 they are</span></span></p><p><span style="font-family: 'Consolas'"><span style="font-size: 12px">using a conformal transducer that can read internal chamber pressures which </span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">is more accurate still. Each time they get more accurate reading on</span></span></p><p><span style="font-family: 'Consolas'"><span style="font-size: 12px">pressure combined with the different bullets, different barrel, different </span></span><span style="font-family: 'Consolas'"><span style="font-size: 12px">powder lot#'s and other components all add up to drastic changes.</span></span></p><p> </p><p><span style="font-size: 10px">72 to 76 grains seems like allot of variance. I just ordered a chronograph and am going to wait to shoot it through there. Once I get around 3600, if my groups are decent, I'm gonna call it good. </span></p></blockquote><p></p>
[QUOTE="jsthntn247, post: 510622, member: 14894"] I am glad I asked this question before I just looked at Hodgdon's website and went blasting away. I have looked at two Barnes manuals, one said 76.0 grains as max and the other said 75.5. I emailed Barnes, and this is the response I got. " [FONT=Consolas][SIZE=3]I just talked to the guys that shoot the data. I hope I can say this as[/SIZE][/FONT][FONT=Consolas][SIZE=3]eloquent as they put it. They said from BRM#3 to BRM#4 the entire way that [/SIZE][/FONT][FONT=Consolas][SIZE=3]they shot data changed. For BRM#3 they used to shoot a charge then measure [/SIZE][/FONT][FONT=Consolas][SIZE=3]the head stamp for expansion. For BRM#4 they used a strain gage to measure [/SIZE][/FONT][FONT=Consolas][SIZE=3]barrel expansion, which was a more accurate reading. For BRM#5 they are[/SIZE][/FONT] [FONT=Consolas][SIZE=3]using a conformal transducer that can read internal chamber pressures which [/SIZE][/FONT][FONT=Consolas][SIZE=3]is more accurate still. Each time they get more accurate reading on[/SIZE][/FONT] [FONT=Consolas][SIZE=3]pressure combined with the different bullets, different barrel, different [/SIZE][/FONT][FONT=Consolas][SIZE=3]powder lot#'s and other components all add up to drastic changes.[/SIZE][/FONT] [SIZE=2]72 to 76 grains seems like allot of variance. I just ordered a chronograph and am going to wait to shoot it through there. Once I get around 3600, if my groups are decent, I'm gonna call it good. [/SIZE] [/QUOTE]
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