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Rifles, Reloading, Optics, Equipment
Reloading
Is there something undesirable about imr 4831?
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<blockquote data-quote="Weaver93" data-source="post: 2666218" data-attributes="member: 120245"><p>I have used both in my 7 SAUM and prefer the IMR. However, I do not see temp swings like the desert guys. It does get hot here, but I'm a morning/evening guy in those situations. <img class="smilie smilie--emoji" loading="lazy" alt="😬" title="Grimacing face :grimacing:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f62c.png" data-shortname=":grimacing:" /> </p><p></p><p>Powder is a strange thing. If you compare a grain of IMR4831 and H4831 you will see a hole in the center of the IMR and not in the H. Newer powders (Hogdon Extreme) have burn inhibitor (deterrent) coatings that seal off these holes and slow the ignition times to prevent spikes. The hotter powder gets prior to ignition the quicker it ignites. Having to burn off the coating slows that whole process down by limiting the initial burn surface available.</p><p></p><p>And yes, when you reach my age looking at extruded powder under a microscope is considered entertaining!</p></blockquote><p></p>
[QUOTE="Weaver93, post: 2666218, member: 120245"] I have used both in my 7 SAUM and prefer the IMR. However, I do not see temp swings like the desert guys. It does get hot here, but I'm a morning/evening guy in those situations. 😬 Powder is a strange thing. If you compare a grain of IMR4831 and H4831 you will see a hole in the center of the IMR and not in the H. Newer powders (Hogdon Extreme) have burn inhibitor (deterrent) coatings that seal off these holes and slow the ignition times to prevent spikes. The hotter powder gets prior to ignition the quicker it ignites. Having to burn off the coating slows that whole process down by limiting the initial burn surface available. And yes, when you reach my age looking at extruded powder under a microscope is considered entertaining! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is there something undesirable about imr 4831?
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