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BAGTIC
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Posted: March 28 2008 at 8:46pm | IP Logged Quote BAGTIC

Does anyone know what year DuPont PB powder was introduced?
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Kosh75287
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Posted: March 30 2008 at 10:54am | IP Logged Quote Kosh75287

No clue. One of my now elderly shooting buddies was using it to reload 20 gauge shotshells in the early 70's, like 1972 0r 73. It's been around for quite a while. I think it's too good a powder to discontinue, but I can see that happening, now that IMR has been acquired by Hodgdon.
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Paul5388
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Posted: March 30 2008 at 1:15pm | IP Logged Quote Paul5388

PB is listed in the 1964 DuPont IMR reloading guide.
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Kosh75287
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Posted: March 30 2008 at 2:10pm | IP Logged Quote Kosh75287

Finally....A gunpowder I like that is NOT older than me....
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Kurt
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Posted: March 30 2008 at 3:57pm | IP Logged Quote Kurt

DuPond started making powder at the Brandywine powder mills in 1802.

Kurt

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AzRednek
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Posted: March 30 2008 at 10:56pm | IP Logged Quote AzRednek

Just curious, does know if PB means anything like the IMR supposedly means improved military rifle and SR is supposed to mean sporting rifle?
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BAGTIC
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Posted: March 30 2008 at 11:05pm | IP Logged Quote BAGTIC

AzRednek wrote:
Just curious, does know if PB means anything like the IMR supposedly means improved military rifle and SR is supposed to mean sporting rifle?


PB meant 'porous base'. It was made full of little holes that made it bulky and controlled the burning rate. I think thet Trailboss may be made the same way. As I understand it a soluble powder was mixed into the powder 'dough' just before extrusion. It was then disolved out leaing little pores. The buring rate could be controlled by the number and size of the pores without use of heavy deterrents.
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Kurt
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Posted: March 31 2008 at 5:17am | IP Logged Quote Kurt

whoops that's what you get when you spend most of your time standing on your head

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Verniersight
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Posted: April 03 2008 at 1:36pm | IP Logged Quote Verniersight

Works well for 9mm target loads. Haven't used it in 14 years though.

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