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Rifles, Reloading, Optics, Equipment
Reloading
WARNING - 4955
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<blockquote data-quote="Calvin45" data-source="post: 2770511" data-attributes="member: 109862"><p>I will not be touching this powder with a 10 foot pole from here on out. Thank God they've discontinued this particular enduron powder, imr 4955. This stuff is downright scary. Freaking dangerous. Just wanted to beat a dead horse <img class="smilie smilie--emoji" loading="lazy" alt="☠️" title="Skull and crossbones :skull_crossbones:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/2620.png" data-shortname=":skull_crossbones:" /> <img class="smilie smilie--emoji" loading="lazy" alt="🐎" title="Horse :racehorse:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f40e.png" data-shortname=":racehorse:" /> for y'all. </p><p></p><p>Got to do some shooting to test a bunch of different loads for velocity data. </p><p></p><p>I was shooting with my beloved old savage 99 in 243 Winchester with the old school Barnes x (not tsx), 75 grain, hbn treated. </p><p></p><p>I have never seen a powder go from mild cratering to a siezed action AND TOTALLY BLOWN OUT PRIMER over an increase of one grain of powder. Except with 4955. I gave it another chance after this exact same thing happened in a 300 win mag about 7 years ago…</p><p></p><p>I was taking notes and chrono readings - Winchester headstamps, fed large rifle primers. </p><p></p><p>45 grains - nowhere near enough pressure, sooty looking, very rounded primers, only 3140 fps. Went up to 49. </p><p></p><p>49 grains - no pressure signs AT ALL. 3452 fps. </p><p></p><p>50 grains. Slight cratering, no pancaking of the primer, no shiny spots on headstamp. Easy extraction 3469 fps. Note - only 17 fps change from 49</p><p></p><p>51 grains - case failure - wouldn't extract, had to "manhandle" the lever violently to get it open. Primer COMPLETELY BLOWN OUT THE BACK OF THE CASE. SOOT EVERYWHERE. And the real shocker: 3631 fps!!!!! <img class="smilie smilie--emoji" loading="lazy" alt="😱" title="Face screaming in fear :scream:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f631.png" data-shortname=":scream:" /><img class="smilie smilie--emoji" loading="lazy" alt="😱" title="Face screaming in fear :scream:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f631.png" data-shortname=":scream:" /><img class="smilie smilie--emoji" loading="lazy" alt="😱" title="Face screaming in fear :scream:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f631.png" data-shortname=":scream:" /></p><p></p><p>Went from very minor cratering to a failure to hang on to the primer over one grain increment. Increased 17 fps from 49 to 50 and increased 162 fps from 50 to 51. </p><p></p><p>WHAT THE HECK!!!!!</p><p></p><p>Any of you ever see anything like this ever?</p><p></p><p>Also again, fair warning, if you own this powder be so freaking careful. It's a disaster waiting to happen. I'm honestly shocked I haven't heard more about it. </p><p></p><p>Had nothing to do with the bullets, brass, gun…used the same bullets with 4 other powders and didn't see any funny business like this working up. </p><p></p><p>Just weird. </p><p></p><p>And scary.</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2770511, member: 109862"] I will not be touching this powder with a 10 foot pole from here on out. Thank God they’ve discontinued this particular enduron powder, imr 4955. This stuff is downright scary. Freaking dangerous. Just wanted to beat a dead horse ☠️ 🐎 for y’all. Got to do some shooting to test a bunch of different loads for velocity data. I was shooting with my beloved old savage 99 in 243 Winchester with the old school Barnes x (not tsx), 75 grain, hbn treated. I have never seen a powder go from mild cratering to a siezed action AND TOTALLY BLOWN OUT PRIMER over an increase of one grain of powder. Except with 4955. I gave it another chance after this exact same thing happened in a 300 win mag about 7 years ago… I was taking notes and chrono readings - Winchester headstamps, fed large rifle primers. 45 grains - nowhere near enough pressure, sooty looking, very rounded primers, only 3140 fps. Went up to 49. 49 grains - no pressure signs AT ALL. 3452 fps. 50 grains. Slight cratering, no pancaking of the primer, no shiny spots on headstamp. Easy extraction 3469 fps. Note - only 17 fps change from 49 51 grains - case failure - wouldn’t extract, had to “manhandle” the lever violently to get it open. Primer COMPLETELY BLOWN OUT THE BACK OF THE CASE. SOOT EVERYWHERE. And the real shocker: 3631 fps!!!!! 😱😱😱 Went from very minor cratering to a failure to hang on to the primer over one grain increment. Increased 17 fps from 49 to 50 and increased 162 fps from 50 to 51. WHAT THE HECK!!!!! Any of you ever see anything like this ever? Also again, fair warning, if you own this powder be so freaking careful. It’s a disaster waiting to happen. I’m honestly shocked I haven’t heard more about it. Had nothing to do with the bullets, brass, gun…used the same bullets with 4 other powders and didn’t see any funny business like this working up. Just weird. And scary. [/QUOTE]
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WARNING - 4955
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