Dupont 4895- IMR 4895 are the the same powder

doceaux · October 27, 2009, 08:58 AM

I was given some Dupont 4895 for my 6.5x55 but I find reloading data for IMR are the interchangeable?

emcon5 · October 27, 2009, 09:34 AM

Does it say "Improved Military Rifle" on the can anywhere?

Sevens · October 27, 2009, 09:40 AM

DuPont owned the IMR powder line for quite a while so I would say that YES, DuPont and IMR data is interchangeable.

What is not simply interchangeable is Hodgdon H-4895 and IMR-4895.

Standard rules regarding using different lots of powder obviously apply.
(that rule ALWAYS applies)

**Mike Irwin** · October 27, 2009, 10:17 AM

Can you post a picture of the container? Or describe the container?

T. O'Heir · October 27, 2009, 02:04 PM

Any Dupont powder is at least 35 + years old. However, like Sevens says, IMR was a Dupont brand name. They got out of the powder business in the late 60's/early 70's.
Their use of IMR(Improved Military Rifle) dates from the 1920's. Mind you, there was no other company using the number '4895' until Hodgdon came along. H4895 and IMR4895 are very close. Numbers 69 and 71, respectively, on Hodgdon's burn rate chart.

wncchester · October 27, 2009, 08:02 PM

DuPont/IMR are the same powder, made in the same plant. They dropped the "DuPont" when the plant was sold, no other change.

velocette · October 27, 2009, 08:33 PM

The powders may be made in the same factory to the same specification, however the powder you have is quite old. If you choose to use it, I would respectfully suggest that you start out at the very lowest end of the loading range. Better safe than sorry.

Roger

October 27, 2009, 08:58 AM	#1
doceaux Senior Member Join Date: September 7, 2007 Location: Texas Posts: 124	Dupont 4895- IMR 4895 are the the same powder I was given some Dupont 4895 for my 6.5x55 but I find reloading data for IMR are the interchangeable?

October 27, 2009, 09:40 AM	#3
Sevens Senior Member Join Date: July 28, 2007 Location: Ohio Posts: 11,775	DuPont owned the IMR powder line for quite a while so I would say that YES, DuPont and IMR data is interchangeable. What is not simply interchangeable is Hodgdon H-4895 and IMR-4895. Standard rules regarding using different lots of powder obviously apply. (that rule ALWAYS applies) __________________ *Attention Brass rats and other reloaders:* I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.

October 27, 2009, 10:17 AM	#4
Mike Irwin Staff Join Date: April 14, 2000 Location: Northern Virginia Posts: 41,642	Can you post a picture of the container? Or describe the container? __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.

October 27, 2009, 08:33 PM	#7
velocette Senior Member Join Date: May 25, 2007 Location: South Florida Posts: 924	The powders may be made in the same factory to the same specification, however the powder you have is quite old. If you choose to use it, I would respectfully suggest that you start out at the very lowest end of the loading range. Better safe than sorry. Roger __________________ Trigger control + Breath control + Sight alignment = Gun Control. http://www.hrpclub.info/ NRA Smallbore Prone Master, High Power Master

October 27, 2009, 09:34 AM	#2
emcon5 Senior Member Join Date: July 11, 1999 Location: High Desert NV Posts: 2,850	Does it say "Improved Military Rifle" on the can anywhere?

October 27, 2009, 02:04 PM	#5
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	Any Dupont powder is at least 35 + years old. However, like Sevens says, IMR was a Dupont brand name. They got out of the powder business in the late 60's/early 70's. Their use of IMR(Improved Military Rifle) dates from the 1920's. Mind you, there was no other company using the number '4895' until Hodgdon came along. H4895 and IMR4895 are very close. Numbers 69 and 71, respectively, on Hodgdon's burn rate chart.

October 27, 2009, 08:02 PM	#6
wncchester Senior Member Join Date: December 1, 2002 Posts: 2,832	DuPont/IMR are the same powder, made in the same plant. They dropped the "DuPont" when the plant was sold, no other change.