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Rifles, Reloading, Optics, Equipment
Reloading
IMR 8133
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<blockquote data-quote="Calvin45" data-source="post: 1739210" data-attributes="member: 109862"><p>Like what I'm seeing with imr 8133 in my .300 win mag. I've posted about my findings but in brief I'm using hbn coated 225 eld bullets in win brass with fed215m primers. Very compressed, 3.56 coal, settled on 79.0 grains, but up to 80 saw no pressure signs of any kind. But velocity plateaued around 78.5, going up to 80.0 only increased velocity by 30 FPS or so, so I went for 79.0, wiggle room, in the middle of a node. One hole 3 shot group at 80 yards. Have only gone out to 400 so far, but it's doing great. 2760 FPS which is slower than Hodgdons data would predict but perfectly acceptable to me, it's still 3800 foot pounds which is typical 300 win power. I may try the 7977 and h1000 I have stocked but the 8133 is really working awesome and I don't see any reason to play with the others and fix what ain't broke. It was right around 0 celcius when I chronoed so i plan to chrono again on a cold day in January (there will certainly be some well under -30 c) and a hot day in June or July next year (there will certainly be some over +30c) and see to what extent it truly is temp insensitive. Living where I do gives great opportunity to test the temperature claims, there's not to many places that swing so extreme from summer to winter. Last February we had days where at 11am it was still -42c (pretty close to Fahrenheit here, -43.6f) and in June got up to 32 c, 94f). I don't feel like going out and shooting in either of those (and I'm sure to some of you in places like Texas and Arizona that doesn't even count as hot yet but I absolutely can not cope with heat, complete baby about it, everyone else here complains in winter, I complain during the summer, I hate it ! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> ) but in the name of science and shooting I'm going to try and get out on those kind of days and really put the enduron powders to the test!</p></blockquote><p></p>
[QUOTE="Calvin45, post: 1739210, member: 109862"] Like what I’m seeing with imr 8133 in my .300 win mag. I’ve posted about my findings but in brief I’m using hbn coated 225 eld bullets in win brass with fed215m primers. Very compressed, 3.56 coal, settled on 79.0 grains, but up to 80 saw no pressure signs of any kind. But velocity plateaued around 78.5, going up to 80.0 only increased velocity by 30 FPS or so, so I went for 79.0, wiggle room, in the middle of a node. One hole 3 shot group at 80 yards. Have only gone out to 400 so far, but it’s doing great. 2760 FPS which is slower than Hodgdons data would predict but perfectly acceptable to me, it’s still 3800 foot pounds which is typical 300 win power. I may try the 7977 and h1000 I have stocked but the 8133 is really working awesome and I don’t see any reason to play with the others and fix what ain’t broke. It was right around 0 celcius when I chronoed so i plan to chrono again on a cold day in January (there will certainly be some well under -30 c) and a hot day in June or July next year (there will certainly be some over +30c) and see to what extent it truly is temp insensitive. Living where I do gives great opportunity to test the temperature claims, there’s not to many places that swing so extreme from summer to winter. Last February we had days where at 11am it was still -42c (pretty close to Fahrenheit here, -43.6f) and in June got up to 32 c, 94f). I don’t feel like going out and shooting in either of those (and I’m sure to some of you in places like Texas and Arizona that doesn’t even count as hot yet but I absolutely can not cope with heat, complete baby about it, everyone else here complains in winter, I complain during the summer, I hate it ! :) ) but in the name of science and shooting I’m going to try and get out on those kind of days and really put the enduron powders to the test! [/QUOTE]
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