Winchester 231 & SR 4756 powders---

Prince55 · July 27, 2008, 12:14 AM

Isn't W-231 powder and SR 4756 about the same burning rate ?
Which is cleaner burning ?
I'm wanting a powder that I can load for handgun shotshells that I can
use as small a charge as possible to get more shot in .357 Magnum case
& also .41 Magnum and still get around 1000-1150 fps.
I have some SR 4756 and it works pretty well with about 5.5 - 6gr. in
both handguns with some # 9 shot.

Thanks

joneb · July 27, 2008, 12:31 AM

W-231 is a faster burning powder than SR-4756, for shot shells I use Bullseye but W-231 should work fine.

Prince55 · July 29, 2008, 01:17 AM

After looking some more-it looks like 700X might be another good one.
Does it burn pretty clean also ?

joneb · July 29, 2008, 07:28 AM

Quote:

looks like 700X might be another good one.

700X and Red Dot would work very well, but they are bulky.

FEG · July 29, 2008, 10:39 AM

IMR SR 4756 is more comparable to the old Winchester WAP or Alliant Unique. It is relatively slow and best suited for cartridges such as 9mm.

You are approaching this backwards. Charge weight isn't the issue. You are concerned about charge volume. As jibjab points out, IMR 700X and Alliant Red Dot charge weights are light, but they take up a lot of volume due to their low density. IMR SR 4756 takes a heavy charge weight, but it is fairly dense. For example, compressed loads start around 6.2 grains in 9mm.

Burning "clean" is more a result of correctly matching the powder to the working pressure than the powder itself. (Some of the old flake powders are relatively dirty, though.) IMR SR 4756 needs a working pressure somewhere around 20,000 psi to burn completely. I am estimating, so the working pressure could be higher. 4756 always burns completely around 30,000 psi for certain.

joneb · July 29, 2008, 08:44 PM

http://www.tacticoolproducts.com/powder.pdf
Looks like Tite Group or AA#2 maybe the best choice for you

In my experience with speer shot shells using #8 shot in .44 spl. is that if you push it to hard the pattern becomes more erratic, and you will get plastic fowling

July 27, 2008, 12:14 AM	#1
Prince55 Senior Member Join Date: June 22, 2007 Posts: 472	Winchester 231 & SR 4756 powders--- Isn't W-231 powder and SR 4756 about the same burning rate ? Which is cleaner burning ? I'm wanting a powder that I can load for handgun shotshells that I can use as small a charge as possible to get more shot in .357 Magnum case & also .41 Magnum and still get around 1000-1150 fps. I have some SR 4756 and it works pretty well with about 5.5 - 6gr. in both handguns with some # 9 shot. Thanks

July 29, 2008, 10:39 AM	#5
FEG Senior Member Join Date: July 14, 2008 Location: Indiana Posts: 324	IMR SR 4756 is more comparable to the old Winchester WAP or Alliant Unique. It is relatively slow and best suited for cartridges such as 9mm. You are approaching this backwards. Charge weight isn't the issue. You are concerned about charge volume. As jibjab points out, IMR 700X and Alliant Red Dot charge weights are light, but they take up a lot of volume due to their low density. IMR SR 4756 takes a heavy charge weight, but it is fairly dense. For example, compressed loads start around 6.2 grains in 9mm. Burning "clean" is more a result of correctly matching the powder to the working pressure than the powder itself. (Some of the old flake powders are relatively dirty, though.) IMR SR 4756 needs a working pressure somewhere around 20,000 psi to burn completely. I am estimating, so the working pressure could be higher. 4756 always burns completely around 30,000 psi for certain. __________________ WARNING: CZs MAY BE HABIT-FORMING. Consult your doctor if nursing or pregnant.

July 27, 2008, 12:31 AM	#2
joneb Senior Member Join Date: December 10, 2005 Location: Central , OR Posts: 1,888	W-231 is a faster burning powder than SR-4756, for shot shells I use Bullseye but W-231 should work fine.

July 29, 2008, 01:17 AM	#3
Prince55 Senior Member Join Date: June 22, 2007 Posts: 472	After looking some more-it looks like 700X might be another good one. Does it burn pretty clean also ?

July 29, 2008, 08:44 PM	#6
joneb Senior Member Join Date: December 10, 2005 Location: Central , OR Posts: 1,888	http://www.tacticoolproducts.com/powder.pdf Looks like Tite Group or AA#2 maybe the best choice for you In my experience with speer shot shells using #8 shot in .44 spl. is that if you push it to hard the pattern becomes more erratic, and you will get plastic fowling