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Old 12-15-2010, 02:51 PM
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Smile Obsolete Winchester Powder

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I have a can of Winchester Ball Powder, Magnum Rifle, and also a can of Winchester Ball Powder, 785. These appear to be obsolete, my powder appears good. But I have no loading data for them, can't find anywhere. I load for 30-06, 308, 220 Swift, and 243 Winchester. Does anybody have any loading data I could use for this powder and cartridges.
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Old 12-15-2010, 05:25 PM
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The only thing I can tell you is that those are pretty slow powders, with WMR being close to 4831 and 785 in the same range as RL22.
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Old 12-15-2010, 06:04 PM
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I can offer you some of Winchester's own load data circa 1980 for their 785 powder:

For .243win with W-785

75gr HP 49.1gr 3400fps 49,000cup
80gr HP 48.8gr 3365fps 49,000cup
85gr HP 47.5gr 3250fps 49,000cup
100gr PP 43.0gr 2930fps 49,000cup

For 30/06 with W-785

150gr ST 59.1gr 2690fps 39,000cup
168gr HP 56.5gr 2610fps 43,000cup
180gr ST or HP 55.5gr 2540fps 45,500cup
190gr HPBT 55.5gr 2510fps 45,000cup
200gr ST 55,5 2490fps 47,500cup
220gr PP or ST 54.0gr 2370fps 47500cup

There are notes to not reduce these loads but use them exactly as shown. They also specify a "Winchester-Western" Large Rifle primer be used, no mention of Winchester Large Rifle "magnum" primer is listed i.e., *use at your own risk* I assume they developed these loads in Winchester brass but they did not mention it.

No load data listed for either .308win or .220 swift.

Good luck...


"Much learning doth make thee mad" - Festus
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Old 12-16-2010, 05:55 AM
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Keep in mind that one major reason both powders were discontinued was erratic pressures in the .243 Win. Use your best judgment.
To see my books and articles, just Google my name.
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Old 12-16-2010, 06:43 AM
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Hornady's fifth addition has data for WMR. I found several pounds of it, and use if for both 7RM and 264WM. Does pretty well, actually, although I have noticed some temp senistivity and not really many of the loads shine accuracy wise- not bad, relative of the results I'm getting with everything else, I suppose. I make it a practice to use Fed 215Ms on both of these rounds, and I think that is hepful with WMR.

It is certainly good advice to exercise care. But it was a good and cheap practice powder that I've been able to stay tuned up with.

Best to you Sir.

Experience is a hard teacher, because she gives the test first, and the lesson afterwards.
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Old 12-17-2010, 10:21 AM
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Originally Posted by Rocky Raab View Post
Keep in mind that one major reason both powders were discontinued was erratic pressures in the .243 Win.
Never heard that one before. And it wasn't worth anything in my .243's.
Could be why.
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Old 12-17-2010, 10:28 AM
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That's the rumor.

Winchester folks won't address it directly. But this is a VERY small industry, and everybody knows everybody. So when a lab tech from Acme Bullets calls a buddy lab tech at Smith&Jones Powder company to chat about loads they are testing, the S&J guy might let out a few cautionary comments about one of their powders in a certain cartridge. Some time later, the Acme tech might find himself chatting with a writer, and ...

That's all I'm gonna say.
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