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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Interesting group during max charge work-up
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<blockquote data-quote="varmintH8R" data-source="post: 839069" data-attributes="member: 39801"><p>I'm not sure if this is unusual or not. I just got a Magnetospeed (which I REALLY like) and decided to run a max-load work-up on my 22-250. Basically, an excuse to try my new toy. The rifle is a Cooper M54 Varminter. Powder used was Varget, pushing 50gr Sierra BlitzKings. I was really only shooting to look for pressure signs and test out the chrony, so I shot 3 foulers at 100 and went on to record:</p><p> </p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">36.0</span> ----<span style="font-family: 'Calibri'">3770</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">No pressure signs</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">36.3</span> ----<span style="font-family: 'Calibri'">3793</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">No pressure signs</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">36.6</span> ----<span style="font-family: 'Calibri'">3819</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">Primer slightly flat</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">36.9</span> ----<span style="font-family: 'Calibri'">3834</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">No pressure signs</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">37.2</span> ----<span style="font-family: 'Calibri'">3885</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">Primer slightly flat</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">37.5</span> ----<span style="font-family: 'Calibri'">3930</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">[BOOK MAX] Primer slightly flat</span> </span></p><p><span style="font-family: 'Times New Roman'"><span style="font-family: 'Calibri'">37.8</span> ----<span style="font-family: 'Calibri'">3980</span> <span style="font-family: 'Calibri'">ft/sec ----</span><span style="font-family: 'Calibri'">Primer is flat, very slight bolt stick</span> </span></p><p></p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">The interesting thing was the shot distribution (picture below). The two shots in the black were 36.0 and 36.3. The only bad load was 37.2, which apparently shoots left <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></span></span></p><p></p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">Even at 100 yds, I was surprised at the lack of vertical stringing with a 200fps difference in velocity. Maybe this is normal for a speedy round like 22-250? I am certainly questioning the usefulness of my OCD powder trickling method. </span></span></p><p> </p><p> </p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px">In any case, I am going to work up some rounds in the 36.6 to 37.2 range and see what I get when I stretch out a little. Historically I have been running 35.8 and it will shoot 1/2 MOA at 100. Maybe I can get a little more speed out of her. Groundhogs beware.</span></span></p></blockquote><p></p>
[QUOTE="varmintH8R, post: 839069, member: 39801"] I'm not sure if this is unusual or not. I just got a Magnetospeed (which I REALLY like) and decided to run a max-load work-up on my 22-250. Basically, an excuse to try my new toy. The rifle is a Cooper M54 Varminter. Powder used was Varget, pushing 50gr Sierra BlitzKings. I was really only shooting to look for pressure signs and test out the chrony, so I shot 3 foulers at 100 and went on to record: [FONT=Times New Roman][FONT=Calibri]36.0[/FONT] ----[FONT=Calibri]3770[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]No pressure signs[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]36.3[/FONT] ----[FONT=Calibri]3793[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]No pressure signs[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]36.6[/FONT] ----[FONT=Calibri]3819[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]Primer slightly flat[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]36.9[/FONT] ----[FONT=Calibri]3834[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]No pressure signs[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]37.2[/FONT] ----[FONT=Calibri]3885[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]Primer slightly flat[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]37.5[/FONT] ----[FONT=Calibri]3930[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri][BOOK MAX] Primer slightly flat[/FONT] [/FONT] [FONT=Times New Roman][FONT=Calibri]37.8[/FONT] ----[FONT=Calibri]3980[/FONT] [FONT=Calibri]ft/sec ----[/FONT][FONT=Calibri]Primer is flat, very slight bolt stick[/FONT] [/FONT] [FONT=Calibri][SIZE=3]The interesting thing was the shot distribution (picture below). The two shots in the black were 36.0 and 36.3. The only bad load was 37.2, which apparently shoots left :rolleyes:[/SIZE][/FONT] [FONT=Calibri][SIZE=3]Even at 100 yds, I was surprised at the lack of vertical stringing with a 200fps difference in velocity. Maybe this is normal for a speedy round like 22-250? I am certainly questioning the usefulness of my OCD powder trickling method. [/SIZE][/FONT] [FONT=Calibri][SIZE=3]In any case, I am going to work up some rounds in the 36.6 to 37.2 range and see what I get when I stretch out a little. Historically I have been running 35.8 and it will shoot 1/2 MOA at 100. Maybe I can get a little more speed out of her. Groundhogs beware.[/SIZE][/FONT] [/QUOTE]
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Interesting group during max charge work-up
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