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Old 04-04-2013, 12:40 PM
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Smile P-5066 Powder

Any of you other old reloaders remember DuPont P-5066 Pistol Powder? I don't see any reference to in in my 1970 Speer reloading manual. I am helping the wife of a 85-year-old disabled shooter clean out his stuff and ran across 2 cans. Any thoughts on whether it is safe to use, and if so, what caliber, etc is is appropriate for. I appreciate your thoughts. Walt
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Old 04-04-2013, 12:47 PM
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Man I been loading since around 1964-65 but never heard of this one. Granted I didn't have much of a loading operation and only a few powders like Unique and Bullseye, 3031 and 4895 back then but I certainly don't recall that powder.
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Old 04-04-2013, 01:09 PM
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Nitro-cellulose powders make good lawn fertilizer. Try that.
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Old 04-04-2013, 01:17 PM
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P-5066 is an old powder that I believe was discontinued about forty years ago. I can remember using it to load 45 acp years ago. Don't ask me what amount I used as I can't remember what was for supper last night.
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Old 04-07-2013, 12:30 AM
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I would first see if it was still good by smell, color and visual.

Then e-mail the company to see if they would have any data for you.

It actually works well as a 45 and 38 target powder but was discontinued around 1966 or 1967 I think. I never used it but one of the gentlemen that started me in reloading had old data on this
powder........ but I would try to verify this data before using it, since it is second hand to me.


38 spl
148 wc 2.9grs at 744
158 LRN 3.8 grs at 875 max load.

45 ACP
185 Jswc 4.2 at 655
185 Jswc 5.8 at 1005 max load
230 fmj 5.7 at 833 max load

Last edited by Nevada Ed; 04-07-2013 at 12:50 AM.
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Old 04-07-2013, 08:40 AM
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I still have about 3 pounds of it! The opened can smells as fresh as new! I have a few older manuals that still list loads with it too.
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Reloading Thread, P-5066 Powder in Ammunition-Gunsmithing; Any of you other old reloaders remember DuPont P-5066 Pistol Powder? I don't see any reference to in in my ...
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