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Rifles, Reloading, Optics, Equipment
Reloading
5.56 powder testing results with 75 gr.
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<blockquote data-quote="Tyler Kee" data-source="post: 1944805" data-attributes="member: 107051"><p>I love that bullet. Buy it in bulk and have shot it through 12.5", 16", and 20" guns. Datapoints on CFE vs Varget are below. </p><p></p><p><em>*****Disclaimer***** these loads are safe in my guns. Do not replicate in your guns. </em></p><p></p><p><strong>20" Armalite w/ 5.56 NATO chamber</strong> </p><p></p><p>This is a 1:9 barrel, so I haven't done a ton with the 75 gr bullets. I did pick up a pound of CFE at one point and figured it might be fun to push some 75s and 55's through it. </p><p></p><p>26 gr of CFE + 75 gr Hornady BTHP = 3 shot .8 MOA group @ 2936 fps.</p><p>28 gr of CFE + 55 gr Hornday FMJ = 3 shot 1.1 MOA group @ 3268 fps </p><p></p><p>The other charges were pretty erratic for both velocity and SD. </p><p></p><p><strong>16" OdinWorks barrel w/ 223 Wylde chamber</strong> </p><p></p><p>23.8-25 gr of Varget+75 gr BTHP gets me 2575-2682 fps - I tune charge weight based on the brass I'm using to get desired SD & accuracy. 2600 fps seems to be a sweet spot. My workups using LC brass were a bunch of 5 shot groups hovering between .6-.8 MOA. Incredibly consistent, though going much above 24.5 gr is compressed and going to 25 gr usually starts deforming bullets trying to cram powder in. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p><strong>12.5" ??? barrel w/ 5.56 NATO chamber</strong> </p><p></p><p>23.4-25.8 gr of Varget + 75 gr BTHP got me 2286 - 2481 fps. </p><p>Max book of CFE is 26.5 gr and it was popping primers at that charge weight, but I did get velocity of 2595 fps.</p><p></p><p><u>Final thoughts</u></p><p></p><p>I've never been blown away by the accuracy potential of CFE, but I will freely admit that it's a speed demon that meters VEERRRRRYYYY easily in my chargemaster. When I have more time and money, I'll put together a CFE+75BTHP load for the SBR that I can crank out in volume. That 75 gr BTHP is supposed to be a pretty decent (budget) home defense & hunting bullet. </p><p></p><p>For the 16" & 20" guns, I care a lot more about accuracy at the expense of speed, so I stick with Varget, but I would love to find a Varget load with good speed that shoots well in both so I can crank those out in volume as well.</p></blockquote><p></p>
[QUOTE="Tyler Kee, post: 1944805, member: 107051"] I love that bullet. Buy it in bulk and have shot it through 12.5", 16", and 20" guns. Datapoints on CFE vs Varget are below. [I]*****Disclaimer***** these loads are safe in my guns. Do not replicate in your guns. [/I] [B]20" Armalite w/ 5.56 NATO chamber[/B] This is a 1:9 barrel, so I haven't done a ton with the 75 gr bullets. I did pick up a pound of CFE at one point and figured it might be fun to push some 75s and 55's through it. 26 gr of CFE + 75 gr Hornady BTHP = 3 shot .8 MOA group @ 2936 fps. 28 gr of CFE + 55 gr Hornday FMJ = 3 shot 1.1 MOA group @ 3268 fps The other charges were pretty erratic for both velocity and SD. [B]16" OdinWorks barrel w/ 223 Wylde chamber[/B] 23.8-25 gr of Varget+75 gr BTHP gets me 2575-2682 fps - I tune charge weight based on the brass I'm using to get desired SD & accuracy. 2600 fps seems to be a sweet spot. My workups using LC brass were a bunch of 5 shot groups hovering between .6-.8 MOA. Incredibly consistent, though going much above 24.5 gr is compressed and going to 25 gr usually starts deforming bullets trying to cram powder in. :) [B]12.5" ??? barrel w/ 5.56 NATO chamber[/B] 23.4-25.8 gr of Varget + 75 gr BTHP got me 2286 - 2481 fps. Max book of CFE is 26.5 gr and it was popping primers at that charge weight, but I did get velocity of 2595 fps. [U]Final thoughts[/U] I've never been blown away by the accuracy potential of CFE, but I will freely admit that it's a speed demon that meters VEERRRRRYYYY easily in my chargemaster. When I have more time and money, I'll put together a CFE+75BTHP load for the SBR that I can crank out in volume. That 75 gr BTHP is supposed to be a pretty decent (budget) home defense & hunting bullet. For the 16" & 20" guns, I care a lot more about accuracy at the expense of speed, so I stick with Varget, but I would love to find a Varget load with good speed that shoots well in both so I can crank those out in volume as well. [/QUOTE]
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5.56 powder testing results with 75 gr.
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