IMR-4759

growr · Jan 12, 2019

My brother gave me 6 lbs of this powder and I would use it in my 44-40 WCF with a 200 grn RNFP. It looks like 14 grains replicates my normal SASS load of 6 grains of Unique.

Anyone have any experience here?

Randy

muddocktor · Jan 12, 2019

From the little I've gathered so far when looking around, SR4759 is used for loading cast bullets in rifle type cartridges.

rockquarry · Jan 13, 2019

#4756 is more commonly used in handgun cartridges, but #4759 may work well in the .44-40 if you can find data for it. It's pretty slow burning for handgun cartridges, slower than #2400, but similar in burn rate to 5744.

I've used it for years in (reduced) cast bullet rifle loads; an excellent powder. #4759 is no longer in production, having been discontinued several years ago.

6string · Jan 13, 2019

Are you sure you don't mean SR 4759?

DuPont's nomenclature was SR for "sporting rifle" and IMR for "improved military rifle".
That said, SR 4759 is quite bulky for it's charge weight. Slightly slower burning than 2400 or IMR4227, but taking up more space, it is best suited for cast bullet loads in large bottle neck cartridges.
I have found it to be top choice for cast bullets in 30-06, 30-30, 308, 7.62 Russian, 303 British, and 7.5 x 55 Swiss (GP11).
In straight wall, large bore revolver cartridges, it ends up needing to be compressed when reasonably powered charges are worked out. Then, it does not behave it's best, giving less than stellar accuracy.

This powder has a strange history of being regularly discontinued and then reintroduced, despite being very popular with many reloaders.
I think it is currently out of production.

Jim

rockquarry · Jan 13, 2019

6string said:
Are you sure you don't mean SR 4759?

DuPont's nomenclature was SR for "sporting rifle" and IMR for "improved military rifle".
That said, SR 4759 is quite bulky for it's charge weight. Slightly slower burning than 2400 or IMR4227, but taking up more space, it is best suited for cast bullet loads in large bottle neck cartridges.
I have found it to be top choice for cast bullets in 30-06, 30-30, 308, 7.62 Russian, 303 British, and 7.5 x 55 Swiss (GP11).
In straight wall, large bore revolver cartridges, it ends up needing to be compressed when reasonably powered charges are worked out. Then, it does not behave it's best, giving less than stellar accuracy.

This powder has a strange history of being regularly discontinued and then reintroduced, despite being very popular with many reloaders.
I think it is currently out of production.

Jim

Yes, #4759 is what I referred to as shown in the post. However, after looking my post again, I only confused the issue by mentioning #4756 at the beginning. #4756 is a much more commonly used for handgun loads than #4759.

Nevada Ed · Jan 13, 2019

I have use the green container SR 4759.......
in 22-250 reduced loads with a 55gr FMJ bullet for plinking
along with any 38 special lead loads for reduced practice loads.

It does a lot better than IMR 4227, in the accuracy department
while using less powder, for these slow loads.

Six pounds of it?
You lucky dog, you.
Enjoy.

Green Frog · Jan 13, 2019

I've used a BUNCH of 4759 in my 32-40 lead bullet loads for Schuetzen (mostly in my high walls) and in the single shot game it was and probably still is, quite popular. OTOH I've never tried it in pistol rounds, so I have no suggestions for you other than to seek out somebody from the American Single Shot Rifle Association (maybe go on their website??) and swap your 4759 for the pistol powder of your choice... I'm sure you would both come out ahead that way!

Froggie

growr · Jan 16, 2019

All of the discussion on this topic is interesting, however I think I will stay with Unique for my 44-40 in rifle and revolver.
Thanks everyone!

Randy

bigedp51 · Jan 16, 2019

I used SR 4759 for reduced loads in rifle cartridges and not have to worry about double charges due to its bulk. I had to change to Trail Boss for my rifle and pistol loads because it was discontinued "again".

I used it below for fire forming my .303 British cases using 100 grain .312 pistol bullets.

IMR-4759

growr

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muddocktor

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rockquarry

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6string

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rockquarry

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Nevada Ed

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Green Frog

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growr

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