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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375/08 vs 375 raptor
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<blockquote data-quote="maaorava" data-source="post: 2971669" data-attributes="member: 2196"><p>Been dealing for a while with 375 raptor AR-10, no idea of reamer maker, but when got the gun, went back to gunsmith, needed to add freebore, it was way too short. He just used some 375 neck reamer when I waited and we tested the gun at his backyard to adjust allso the gasblock, was easy fix. Have CH4Dies. Forming from 308 to 375 raptor is easy if brass is soft, have used Sako and Lapua cases, almost 100% success with CH4Dies FL die. I annealed the cases (oncer shot as 308 factory loads before formed to 375) after first shot as 375, and looks like the steeper shoulder angle of Raptor compared to 308 has formed correctly when firing first time as 375 Raptor. If someone uses not so soft brass as Sako and Lapua's necks are, annealing may be a good idea before forming if someone uses once fired brass. The shoulder angle is so steep, same phenomen as forming 300 AAC BLK from 223 cases. Sako/Lapua neck thickness is too thin to get enough neck tension in my AR-10. Jacketed bullets or copperplated CamPro 250 grainers are OK, but many solid copper or brass solids need more tension, maybe due too small neck thickness of from 308 to 375 stretched Lapua/Sako necks and formed with CH4Dies dies. Solution? Just cheap Lee 375 H&H factory crimp die, and cut the die body and inside moving part to become a bit shorter in order to crimp 375 Raptor cases. Just use some time to measure and study the die function and calculate needed dimensions. Voila, short Raptor neck with under sized boreriders not anymore a neck tension problem in a gas gun.</p></blockquote><p></p>
[QUOTE="maaorava, post: 2971669, member: 2196"] Been dealing for a while with 375 raptor AR-10, no idea of reamer maker, but when got the gun, went back to gunsmith, needed to add freebore, it was way too short. He just used some 375 neck reamer when I waited and we tested the gun at his backyard to adjust allso the gasblock, was easy fix. Have CH4Dies. Forming from 308 to 375 raptor is easy if brass is soft, have used Sako and Lapua cases, almost 100% success with CH4Dies FL die. I annealed the cases (oncer shot as 308 factory loads before formed to 375) after first shot as 375, and looks like the steeper shoulder angle of Raptor compared to 308 has formed correctly when firing first time as 375 Raptor. If someone uses not so soft brass as Sako and Lapua's necks are, annealing may be a good idea before forming if someone uses once fired brass. The shoulder angle is so steep, same phenomen as forming 300 AAC BLK from 223 cases. Sako/Lapua neck thickness is too thin to get enough neck tension in my AR-10. Jacketed bullets or copperplated CamPro 250 grainers are OK, but many solid copper or brass solids need more tension, maybe due too small neck thickness of from 308 to 375 stretched Lapua/Sako necks and formed with CH4Dies dies. Solution? Just cheap Lee 375 H&H factory crimp die, and cut the die body and inside moving part to become a bit shorter in order to crimp 375 Raptor cases. Just use some time to measure and study the die function and calculate needed dimensions. Voila, short Raptor neck with under sized boreriders not anymore a neck tension problem in a gas gun. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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375/08 vs 375 raptor
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