July 6, 2012, 08:57 AM | #1 |
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powders
Ok- Looking for info on 2 powders. What is the difference between these 2 powders.
H-4895 IMR 4895. Shooting a 308. Having great luck with H-4895,but some same i should try IMR-4895.
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July 6, 2012, 09:35 AM | #2 |
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They have slightly different burn rates and thus, produce different pressures. If you try the IMR 4895, reduce your loads by at least 10% and work back up!
I have found that some of my guns such as the .220 Swift like the IMR products better and my .243 like the Hodgdon powders better! Don't know why?
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July 6, 2012, 01:54 PM | #3 |
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Thanks- So IMR-4895 has a faster burn rate?.
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July 6, 2012, 02:01 PM | #4 |
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No sir. Slower. On my chart, H4895 is listed at 110 and IMR 4895 is 114. But they will produce different pressure curves, so you still need to start lower and work up when substituting one for the other.
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July 6, 2012, 02:05 PM | #5 |
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According to Hodgdon, who sells both powders, IMR 4895 is slightly slower than H4895. Hodgdon lists H4895 at 87 on their burn rate chart, and IMR 4895 at 89. They are very close in burn rate, but we can draw no conclusions based on that. They are two different powders. Additionally, one is made in Canada and the other in Australia. There is also a British 4895 made in England, and I'd be surprised if other counties aren't making a similar powder as well. They share similar properties, but should not be confused.
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July 6, 2012, 02:24 PM | #6 | |
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July 6, 2012, 02:29 PM | #7 |
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Hodgdon, IMR and Winchester powders are all sold by the same company!
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July 6, 2012, 04:25 PM | #8 | |
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It's interesting to note that IMR and ADI both market a powder known as Trail Boss, and ADI claims that they are compatibly equivalent. ADI is the Australian powder and they have a compatibility chart that is very interesting. It's also interesting to note that Hogdon 110 and Winchester 296 are exactly the same powder. Hodgdon will tell you that they only change the label on the jug. Same powder. Last edited by PawPaw; July 6, 2012 at 04:34 PM. |
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July 6, 2012, 04:45 PM | #9 |
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The Hogdon Powder Co, is only 30 mins away,(when traffic is good)I generally buy my powder from Bass Pro or Cabelas in Kansas City Kansas,(i gotta stay away from there). oh yeah : [email protected]
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July 7, 2012, 09:53 AM | #10 |
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Powders- Who is making what?
MSDS > http://www.hodgdon.com/msds.html and http://www.alliantpowder.com/resources/msds.aspx http://www.photobucket.com/firearmsreloading When you open a new container of powder, always use a starting load & work up for safety. The can may look the same, but what is inside might be from a new/different powder company. St. Marks & Alliant formed the American Powder Company around 2000 .
Last edited by 243winxb; July 7, 2012 at 09:58 AM. |
July 7, 2012, 10:01 AM | #11 | |
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Caution is warranted but that's a wee bit extreme. If you note the Lot # from your jugs, you may well find that your new jug is that same Lot # as your old jug. In which case, no change is warranted whatsoever. Even with a new lot number, reduction of about 5% are generally considered sufficient. Most powders vary (in theory) slightly from lot to lot but wholesale changes in the formulation, that affect pressure, are pretty rare.
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July 7, 2012, 10:49 AM | #12 | |
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July 7, 2012, 11:04 AM | #13 | |
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July 7, 2012, 11:22 AM | #14 | |
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Hodgdon does not make powder...they just market powder....except IMR and GOEX. Last edited by SHR970; July 7, 2012 at 11:52 AM. |
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July 7, 2012, 11:45 AM | #15 | ||
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Last edited by Scimmia; July 7, 2012 at 11:50 AM. |
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July 7, 2012, 11:49 AM | #16 | |
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I have a can of Unique that was dated to the late 50s or so. It burns within (or produces velocities anyway) about 10% of modern data. Not only is it 50 or so years old but Unique has since been reformulated so it's almost worst case scenario. |
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