SR-4756 and PP in 9mm & 40 S&W?


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kk5ib
April 14, 2007, 10:34 PM
I have loaded a lot of 9mm & 40 S&W using SR-4756, clean burning, accurate, good velocity & low pressure. In 9mm it's usually 115 gr JHPs and 6.0 gr of 4756, powder fill is about 100% + with a little compression. In 40 S&W it's usually 165 gr Golden Sabers and 7.0 or 7.2 gr of 4756. I'm not interested in P+ loads, just close to factory velocity, as my Ruger KP944DOA seems to be set for standard factory loads. Does anyone have any experience with these load combinations, as they seem to be somewhat hard to find in my load manuals? Latest manuals on hand are Hornady 6th ed. and Lee 2nd ed, neither of which have 165 gr 40 S&W bullets listed. Also any loads with Power Pistol and same bullets for comparison would be appreciated. I just haven't sprung for latest manuals as I have a dozen or more already.

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CZ57
April 15, 2007, 02:17 AM
kk: I've loaded the 165 gr. Golden Saber quite a bit, but not with 4756. Until recently, I hadn't been firing .40 a lot. That changed a few months back with the purchase of a CZ 75 B. It is the most accurate .40 I have ever seen, maybe the most accurate pistol I have seen period and that goes back nearly 30 years. I looked at using 4756 and WSF, along with some other powders I have, but I try to load for minimum muzzle flash and the guys that I know that use it, told me to expect flash. I like the powder a lot for cast loads in magnum revolvers and I never got around to using it 9mm, but the people I know that have are very impressed with accuracy.

I'm not helping you here, but something that might is a phone call to the Techs at Sierra: 800 223-8799 They make a 165 gr. JHP, and since you're not likely to find pressure tested data for the 165 gr. GS, anyway, this will work. Golden Sabers with their very short shank/driving band, usually run at the lowest pressure at a given weight. I've loaded tens of thousands of them in 9mm, .40 and the .45 ACP. Sierra JHP bullets have a truncated cone shape and usually the longest bullet shank by weight and caliber. Typically, their bullets with the same powder charge as another brand of identical weight bullets are the highest in pressure. I bet they have the data for 4756 and will give it to you for start charge and max. load with velocity for the max. charge. BTW, I use Ramshot True Blue and Silhouette for this and if you had them, I could give you data for the GS.;)

As far as 9mm goes, I have data but it is from an older manual and the max charge runs a bit higher. If you don't want to load +P, I'd say keep it at 6.0 grs. with the 115 gr. bullet. With a charge any higher you probably will get into +P pressure.

I don't use Power Pistol. Tried it once and that was enough for me. Very bright flash in 9mm and .40 S&W, but I can help with some load data. For the 115 gr. 9mm 6.7 grs. is a max charge for an FMJ at 1.120" OACL. Velocity is 1280 FPS @ 33,500 PSI. Start at 6.0. If you use a JHP, load to the same OACL and you'll be fine. For the .40 165 gr. GS, check with Sierra on that one as well. I don't have data for it.

Shoney
April 15, 2007, 08:52 PM
You can find load data from the major powder distributer here:

http://data.hodgdon.com/main_menu.asp
http://www.alliantpowder.com/reloaders/Index.htm
http://www.accuratepowder.com/reloading.htm
http://www.lapua.com/uploads/media/H...ngData2006.pdf
http://www.ramshot.com/powders/

There are lots of reloading sites with data available, just do a search.

I don't mean to sound flippant, but I do not publish my loads on the internet, nor do I use data from individuals without checking it against data in the sites above. Since each weapon is different in so many ways, with the great variety of bullets, it is an exercise in futility; not to mention the legal ramifications if I commit a typo (If yu gut my dirft.)

CZ57
April 15, 2007, 09:14 PM
Here's one that will be useful as well:http://www.imrpowder.com/data/handgun/9mmluger.php and their load for 4756 with a 115 gr. jacketed bullet, surprisingly, is the same as the load from the SPEER #11, at 6.3 grains and it is a compressed load.

The PP load for 9mm is from the Alliant booklet.

Shoney makes a good point, but the best place to start is with a good reloading manual. The various powder sites are very useful, but not a substitute for your load manual, especially one that gives pressure data. If you don't have one and load Handgun loads exclusively, Try the Lyman Pistol & Revolver III. If you also load rifle, add the Lyman 48 with it. Their load data is pressure tested and many loads show pressure data.

The Problem with the .40 165 grain Golden Saber is that you won't find pressure tested data. The various load sites on the web most often show people tested loads rather than pressure tested loads. The latter is highly preferable.;)

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