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twobit · November 4, 2012, 09:29 PM

I've found my late father's reloading notes and have a question?....
In 1976 He loaded a great round for my bolt action .270 and refers to the powder being 4320 but does not list the brand. Here is the recipe....
48 1/2 grains of 4320 for a 130 grain Norma soft point boat-tail (nickel colored bullet). Primer was 210 Federal. His notes say "about 3000 fps".

When I look up 4320 in modern data it states never exceed 47 grains. My father would have never exceeded posted limits on anything he reloaded. If the 4320 he used was the same as i find today then he exceeded the maximum by 1 1/2 grains per today's charts! My question is ...is the current IMR 4320 the same powder that he used in 1976?

I still have and still shoot some of those 1976 reloads in the same gun. It is an excellent whitetail round. I would like to recreate that same load today although I don't think I could find the Norma bullet he used. Please help me determine if the powder is the same...thanks

November 4, 2012, 09:29 PM	#1
twobit Senior Member Join Date: February 25, 2010 Location: Coyote Creak, SW Texas Posts: 597	4320 powder question I've found my late father's reloading notes and have a question?.... In 1976 He loaded a great round for my bolt action .270 and refers to the powder being 4320 but does not list the brand. Here is the recipe.... 48 1/2 grains of 4320 for a 130 grain Norma soft point boat-tail (nickel colored bullet). Primer was 210 Federal. His notes say "about 3000 fps". When I look up 4320 in modern data it states never exceed 47 grains. My father would have never exceeded posted limits on anything he reloaded. If the 4320 he used was the same as i find today then he exceeded the maximum by 1 1/2 grains per today's charts! My question is ...is the current IMR 4320 the same powder that he used in 1976? I still have and still shoot some of those 1976 reloads in the same gun. It is an excellent whitetail round. I would like to recreate that same load today although I don't think I could find the Norma bullet he used. Please help me determine if the powder is the same...thanks __________________ Twobit, Strive to live up to the opinion that your dog has of you.