The end of SR4756

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The end of SR4756

Postby C M Wings » Sat Feb 22, 2014 3:41 pm

I purely by accident came across a thread from a handgun site that stated that IMR is going to discontinue SR4756 this year.

http://www.brianenos.com/forums/index.p ... pic=186600

Anyone hear that? Several loads I was preparing for (I have a pound) call for it.

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Re: The end of SR4756

Postby Jon Bergren » Sat Feb 22, 2014 4:47 pm

I still have a couple of pounds of it. Ned S
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Re: The end of SR4756

Postby steelshotshooter » Sat Feb 22, 2014 5:11 pm

I called Hodgdon a couple of weeks ago and was told that when the current supply is gone, there will be no more....
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Re: The end of SR4756

Postby C M Wings » Sat Feb 22, 2014 5:24 pm

So I hope the various manuals publish STEEL or some other powder replacement recipes.

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Re: The end of SR4756

Postby 3200 man » Sat Feb 22, 2014 6:04 pm

What a great powder this is along with Longshot , 800X and Herco , saying that I have a lifetime supply of them all
But , I can sure more recipes for Steel shot loads as I'm happy with what I load in Lead.....Gaep'ed .....with Buffer .
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Re: The end of SR4756

Postby Sagebrush » Sat Feb 22, 2014 9:33 pm

It was know as the powder that made "The Load" in the 38 special with the 158gr Lswc bullet.
No other powder could touch it in the maximum velocity that it produced in a K frame.

It worked ok in my 357 magnum but was touchy at minimum and maximum loading in my 686 6".
If they keep making HS-6 and 2400 powder, I will not miss it.

same with w452, w540 , w571..............HS-7
Last edited by Sagebrush on Sun Feb 23, 2014 10:18 am, edited 1 time in total.
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Re: The end of SR4756

Postby BT Justice » Sun Feb 23, 2014 6:09 am

I kind of figured this was going to happen when Hodgdon took over the IMR powders, what upsets me so much is they don't have replacement powders to fill the gap. 7625 I can live without, but 4756 makes some really great lead loads especially in 10 ga and 12 ga 3". Oh well have to stock up if I can find some more.
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Re: The end of SR4756

Postby grnhd » Sun Feb 23, 2014 7:09 am

I'm curious, what can that powder do that steel cant do better? From the data I've seen, steel produces less pressure and more speed for the same shot weight.
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Re: The end of SR4756

Postby wildflights » Sun Feb 23, 2014 7:29 am

grnhd wrote:I'm curious, what can that powder do that steel cant do better? From the data I've seen, steel produces less pressure and more speed for the same shot weight.


Drop accurate charges without weighing every one of them. I've been loading some steel target loads with it. I'd like to get a couple 8 lb jugs before it disappears.
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Re: The end of SR4756

Postby grnhd » Sun Feb 23, 2014 7:38 am

wildflights wrote:
grnhd wrote:I'm curious, what can that powder do that steel cant do better? From the data I've seen, steel produces less pressure and more speed for the same shot weight.


Drop accurate charges without weighing every one of them. I've been loading some steel target loads with it. I'd like to get a couple 8 lb jugs before it disappears.


Hmm, I hadn't thought of that. :huh: :lol3:
I was talking about performance though for the same load.
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Re: The end of SR4756

Postby C M Wings » Sun Feb 23, 2014 8:19 am

One thing where it seems to matter in load performance is in shot size.

The RSI book has a 4756 load in TT, and the exact same load in STEEL but only up to T.

I don't think that's an "1.5 ounces is 1.5 ounces" argument or we'd all be using lead powders and load data (minus the wads) for steel shot.

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Re: The end of SR4756

Postby steelshotshooter » Sun Feb 23, 2014 8:57 am

SR4756 may not give the same speed as STEEL but, it is a very consistent and reliable powder for steel shot loads. This powder also gives the highest velocity in the 28 ga. for steel, running right at 1,600 fps. for a 1/2 oz. load. This would make for an excellent decoying duck load. I only mention this because of the 28 ga. info on another thread. 20 ga. steel shot loads can be pushed to 1,500 fps. with SR4756 powder, and even though it does not produce the "fastest" 12 ga. loads, it does produce some of the better patterning loads with steel shot...

Good thing I was able to pick up two 8 lb. jugs of this powder, so I guess I'm set for a little while....
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Re: The end of SR4756

Postby lostknife4 » Sun Feb 23, 2014 1:45 pm

One 5 lb can and one 1 pound can, good for a while too!
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Re: The end of SR4756

Postby BT Justice » Sun Feb 23, 2014 3:05 pm

grnhd wrote:I'm curious, what can that powder do that steel cant do better? From the data I've seen, steel produces less pressure and more speed for the same shot weight.

With most steel shot loads STEEL powder works better but that's what it was designed for.
SR 4756 works very well with heavy lead loads especially in the 10 ga., STEEL is considered a High Energy powder which basically means it has more Nitroglycerin content in it, which has a great burn curve for steel shot loads but with heavier lead loads it peaks out pressure wise way to fast, even though it's slower burning technically you get no real benefit from it velocity wise, if that makes any sense. As was stated SR 4756 is a lot more predictable in what it will do in many loads , high nitroglycerin content powders are not in many applications.
To a lesser extent you can also see this with Longshot loads, if you look at heavy lead loads there is really not much difference in velocities between 4756 and Longshot in many heavy lead applications, maybe 50 fps in some loads. Not that Longshot is not good for lead loads, it just peaks out pressure wise much faster than other powders and has to be used carefully because pressures peak so much faster with it.
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Re: The end of SR4756

Postby bassmaster624 » Sun Feb 23, 2014 4:57 pm

it's a shame.loved that powder for both lead and steel.guess I will have to hang onto what I got and use it with caution.when I couldn't find any 4756 I went to blue dot just wasn't the same.
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