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deleted
339 Posts |
 Posted - Jul 01 2012 : 12:58:41
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quote:
Originally posted by MIKESBARRO
quote:
Originally posted by Big 4
About 58 grs. of IMR 4831, depending on your rifle, is the classic .270 load for the 130 gr. bullet..4831 and the .270 is a match made in heaven, O'connor told me so! 53 grs is really to weak and underloading 4831 can be as dangerous as over loading it.
If I'm not mistaken, Jack O'connor used military surplus powder which was actually H4831...not IMR-4831. Maybe Jack was into the Koolaid when he told you that.
7x57guy |
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curly
Moderator
Canada
2809 Posts |
Posted - Jul 01 2012 : 17:41:58
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The military surplus powder used for 20mm cannons (if I remember correctly) was designated 435Q powder by reloaders at that time....
Reason being they knew they could use IMR4350 load information and not blow themselves up because the surplus powder was a slower burner than 4350.....O'Connor was one of the first to get his hands on the stuff, because he already had it figured that it would boost velocities in his .270's....I'm sure Jack had an "in" with Mr. Hodgdon....and the rest is history: H4831, the .270 Winchester, and Jack O'Connor.....
Roy Weatherby was of the same mindset for his thundering wonder cartridges...
My Speer reloading manual #9 has the IMR4831 powder listed in its publication from 1974...So its been around since at least the early 70's....but I highly doubt O'Connor worked with it to any great extent....one reason being he was getting up there in years....he passed away on board the SS Mariposa in January of 1978...
Curly
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MIKESBARRO
Advanced Member
USA
2626 Posts |
Posted - Jul 01 2012 : 20:34:51
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Thanks Curiy. I did a little digging myself. Dupont introduced IMR-4831 in 1973 when supplies of the military surplus were exhausted. O'Connor would have been 71 yrs old.
http://en.wikipedia.org/wiki/Hodgdon_Powder_Company
Mike |
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603Country
Starting Member
USA
8 Posts |
Posted - Jul 06 2012 : 14:40:25
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| For years I've used the 130 Nosler Ballistic Tip and 59 grains of H4831sc. CCI BR2 primers and Remington cases (soon to switch to Norma cases). That's a pretty hot load, so work up to it carefully in your rifle. |
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Big 4
Average Member
USA
86 Posts |
Posted - Jul 20 2012 : 23:34:31
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Jack O'Connor used a Milsurp 4831, neither H or IMR, but known by 4350 DATA or Military 4831..It was the best powder ever for the .270..I still have 40 lbs of that ole stuff and I use 62 grs for a 130 gr. bullet for a tad over 3200 FPS and less pressure than todays 4831 powders..Same load that Jack used
DON'T USE THIS 62. GRAIN WEIGHT WITH TODAYS 4831 POWDERS, IT WOULD BE HAZARDOUS TO YOUR HEALTH.. |
Edited by - Big 4 on Jul 20 2012 23:36:35 |
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Hublocker
Junior Member
Canada
51 Posts |
Posted - Aug 07 2012 : 15:16:20
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| I use 58 grains of H4831 and 150 grain bullets because where I hunt deer, we are permitted to shoot moose and elk too (with shorter seasons and some antler restrictions), plus I might be inclined to shoot another black bear this year too. |
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270
