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M1 Garand Ammunition

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Old 04-03-2010, 10:25 AM   #21
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[QUOTE=robocop10mm;259073]The issue with the Garand is the burn rate of the powder. This dictates the pressure curve and the pressure when the bullet passes the gas port. Slower burning powders peak later and allow excessive pressure through the port. This can damage the operating rod.[QUOTE]


I have been using IMR-4064 for all of my .30-06 re-loads for 30+ years. I use 48.5 grains of 4064 for my M-700 hunting rifle with a 165 grain Nosler ballistic tip bullet), and have been using the same ammo in my 1903-A3. I reduced the load for my M1 Garand to 46 grains of 4064 with a 165 grain Sierra SPBT bullet. Do you consider the 4064 to be a too slow buring powder?

I have just started to load for my .308/7.62 M1A using IMR-4895.

Your opinion please.
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Old 04-05-2010, 01:25 PM   #22
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It is generally accepted that 4895 IS the powder used in M-2 ball ammo. 4064 is considered the SLOWEST you can safely go in a Garand. Your load (46gr) looks a little light as the Hodgdon web site has 47 gr as the minimum load. If it works in your rifle with the brass you are using I would not sweat it, you appear to be in safe territory.
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