Mystery powder?

[TAJ45]

I have 4, 1# cans, relabeled SR 4759.
What is / was it?
Also several original pkgd cans of WW 571 - same question.
I have searched the 571 w no success.
Thought I'd toss both out while asking.
TIA, Tom

 

[jimbires]

I've used IMR sr4759 for reduced recoil loads . here is a link to midway USA .

https://www.midwayusa.com/product/2185268890/imr-sr4759-smokeless-gun-powder

 

[Langey]

IMR SR 4759: This bulky handgun powder works great in the magnums, but really shines as a reduced load propellant for rifle cartridges. It's large grain size gives good loading density for reduced loads, enhancing velocity uniformity.

WW 571: A magnum shotshell propellant for high velocities in 12 guage 1 3/8 oz. and 1 1/2 oz. loads and other heavy field loads. Suitable for .38 Super, 9mm, 40 S&W and 10mm loads.

Both are listed in this Burn Rate Chart: http://www.accuratepowder.com/wp-content/uploads/2010/12/burn_rates.pdf

 

[hogpatrol]

IIRC, the guys at our club use SR4759 for shooting cast bullets in their high power centerfire rifle matches.

 

[wapiti25]

ww-571 is hodgdon HS-7 mag shotgun and slow pistol. IMR SR 4759 is good for cast bullets in rifle's, may be discontinued as of about 2-3 yrs ago.

 

[billlarson]

I've used IMR sr4759 for reduced recoil loads . here is a link to midway USA .

https://www.midwayusa.com/product/2185268890/imr-sr4759-smokeless-gun-powder

If you are thinking of using it for reduced loads....BE CAREFUL....... more guns are blown up with reduced loads than overloads.....

 

[JimPag]

If you are thinking of using it for reduced loads....BE CAREFUL....... more guns are blown up with reduced loads than overloads.....

That's with regular smokeless powder. SR4759 was designed for reduced loads. I have used it with 225 grain bullets in my 375 H&H to hunt whitetails.

 

[SBS]

SR4759 is also an excellent powder recommended by Savage for their discontinued smokeless powder muzzleloader, the Model 10 ML II

 

[Laurie]

DuPont developed SR 4759 sometime after WW2 at a US Army request specifically for reduced military rifle cartridge loads with normal full-patch jacketed bullets. There was an ongoing requirement to test bullets' abilities to penetrate steel etc helmets, thin soft-skin vehicle body panels, body armour and suchlike at long ranges. The problem in testing standard-load ammo with various bullets was the problems of obtaining hits at say beyond 700 or 800 yards with ordinary iron-sighted military rifles on items the size of am infantryman's headgear, so the other approach was adopted of loading much reduced velocity ammo at the muzzle, so that it replicated standard ammunition's long-range terminal velocities at maybe 50-300 yards. DuPont then made the powder available to the handloading market in canister grade and it was very popular for many years amongst those who want to load reduced jacketed bullet loads, lead bullet loads, replicating 19th century large calibre black powder cartridge loads etc. Like today's IMR Trail Boss, Accurate 5744 and one or two other specialised grades, it was designed to give high case fill-ratios and very consistent pressures / velocities in this role, so there is no risk in low pressure / MV loads as there may be in over-reducing a standard powder charge weight.

 

[M-61]

'full-patch'.....that rolled the clock back a few decades for me!!

 

[Tim Singleton]

It's a great powder to load for subsonic shooting gives good load density

 

[HTSmith]

I used it to load 30/30 equivalent loads in my 30/06 for my 11 year old son to shoot. It worked great.

 

[TAJ45]

Thank you very much everyone. Good info and appreciated. Tom