SR 4759 for 300 WSM?

roadwarrior

roadwarrior

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Hey guys, well there it is, I want to work up a reduced load for my 300 WSM. Speer lists some reduced loads with AA 5744 with 150 gr. bullets. I don't have any of that.

What I do have is Sierra 165 gr. btpsp and a full pound of SR 4759. In the Speer manual, they list loads for the 300 H&H (24 to 28gr. using CCI 200's) and for the 300 Win. Mag. (25 to 29gr. using CCi 250's).

Am I going to blow up my rifle if I try to work up a load starting at 24 gr. with CCI 200's? Have any of you experienced off the charted waters with this powder?
 
No, you won't blow up your gun. That's exactly where I'd start, and I'd stop when I reached the MV listed for the max load of AA5744 in the 300 H&H.
 
have you thought of some cast bullet loads

I have used SR4759 in 30-30 and 308 with cast bullets up to around 1950 fps and using that powder you can hear the powder in the case in a loaded round when you shake it

some say you can go up to 2500 fps with no leading (with gas-check)

sorry I have no load data for you :(

When you start look for pressure signs:eek:
 
I may look for some cast bullets for cheap plinking later, but right now I'm trying to get close to 30-30 specs so I can bring this gun out as a spare deer rifle. Most shots are under 50 yards where we hunt, so I thought shooting full loads were a bit much since I don't want to scrap any meat.

I bought the powder in Le Baron in Ottawa.

I did some testing on friday. Started at 24 gr. and went in 0.5gr increments to 28 gr. From there I went up 0.1 gr. at a time until I reached 28.5 gr.

The only sign of pressure I saw was a faint bolt head transfer on the 28 gr casing, but no signs on any of the others up to 28.5 gr.

As I tested for pressure, I also did a ladder test. There seemed to be a sweet spot at 25 to 26 gr. and again on the upper side of 28 gr.

I'm working on loading a few rounds to further test these. Only thing that sucks is that I don't own a chrony or a ballistics program yet.
 
...the guys buy it all up to shoot in their Savage muzzleloaders.
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Quilty as charged.

BTW my IMR manual shows these loads;

300HH with 180 is 38grs max with 2330MV at 54000CUP.

300winmag with 180 is 38.5 max with 2435 at 53700 CUP.

They are far over what Speer chooses to publish - this is the norm for Speer reduced loads with that powder I've found. Speer often cut off adding powder when 2000MV is reached. Guess after all it is a reduced load.

...a ladder test
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What's that ???
 
RojamB21 said:
Something's FISHY.
Why you need a WSM if you needs to bring it down to 30-30 level and not planning to shoot more than 50 yards:agree:
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So what?

Here's someone trying something a bit different, unlike most guys who just buy their ammo from Canadian Tire. There's quite a bit to learn here about reduced loads and any knowledge that can be shared is good, even if it doesn't apply to you. Now he has a gun he likes that can perform from reduced 30/30 to full house 300 WSM. SR4759 is my go-to powder for cast bullet rifle loads, but I haven't tried it with jacketed. It seems like it'd be a good choice to load down my 300 RUM to 308, but given the size of that case H4895 might be more suitable.
 
Well said, thanks Andy. The very reason that I made this post is that I couldn't find anything on the web that would validate or invalidate using SR 4759 for 300 WSM. I could only find one post on 24hr. camp fire where a guy asked if it could be done. Only one guy answered telling him that the 300 H&H had the same case cap and that he should follow it's min. charge. The original poster never came back with the results or even said if he tried it for that matter.
 
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People have been using SR4759 (and other powders) for reduced loads in large cases for many years. I have a "Lyman Cast Bullet Handbook" from 1980 that lists loads for the 300 Win Mag:

For 180gr Cast

Suggested Start

30.0 grs - 2025 fps - 28.4K CUP

Max

40.0 grs - 2400 fps - 49.5K CUP

I'd reduce those loads by 10% if using jacketed bullets, which puts you pretty much where you were anyways (27.0 to 36.0 grs). The Speer data shared in an earlier post confirms this (it was for jacketed bullets).

H4895 is also a popular reduced load powder. With a 180gr I'd work in the 40.0 to 50.0 gr range.
 
I have a Speer number 11 manual that lists a 300 win mag using a 165gr jacketed bullet, Using SR4759 powder.

25gr 1736 fps
27gr 1892 FPS
29gr 2000 FPS

Hope this helps you out.
 
RojamB21 said:
20, 25 grains are going to leave almost 3/4 of the case empty and only good for a POOF not bang, GOOD LUCK , anyway, NO COMMENTS
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You are either guessing, or read that somewhere, because it's not true.

I have used 30.0 grs of SR4759 in the 577 Snider which is far larger than the 300 WSM, and got reliable ignition without any filler.
 
RojamB21 said:
20, 25 grains are going to leave almost 3/4 of the case empty and only good for a POOF not bang, GOOD LUCK , anyway, NO COMMENTS
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Keep it up with that attitude, it just leaves more for me. As I said, I thought they discontinued the stuff, if I didn't have my 223 now I'd be all over a couple of pounds for reduced loads in my 30-06; I may still buy a couple of pounds just for kicks and giggles.
Mike
 
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