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Old June 14, 2012, 09:20 AM   #1
CCCLVII
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need help from some body with load book

I am looking to make a subsonic load for a 45/70 using jacketed bullets. (.458 caliber)

the bullets I am planning on using are Hornady 500 grain interlock bullets, they come in at 1.38 inches long. The Brass is Winchester and holds 80.3 grains of water. The total over all length of a loaded bullet is 2.55 inches

I am looking for some thing at 950-1000 FPS. The Barrel is 18.5 inches long (Marlin 1895 GG)

I am looking for the fastest powder possible that will still preform satisfactory. I have tried Trailboss and it is not able to get the speeds I need (Tops out about 750 FPS)

I can provide other information as needed
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Old June 14, 2012, 09:39 AM   #2
Jimro
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I would try working up a load with Red Dot. There is a lot of data on 13 grains of Red Dot under a 405 gr cast bullet, but not a lot for a jacketed 500 grainer. 13 gr of Red Dot can push the 405 gr pill in the velocity range you want.

What type of firearm are you using?

Jimro
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Old June 14, 2012, 11:39 AM   #3
CCCLVII
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This is a a lever action.
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Old June 15, 2012, 10:45 AM   #4
Lead Man
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500 grain 45/70

I load IMR 4227 23.0 to 27.0 grains under a 500 grain CAST .459/500 Lee bullet. The velocity SHOULD be in the 1,000 to 1,300 fps range. I shoot this in a 1874 Uberti Sharps 'Quigley'. The barrel is half again the legnth of your Marlin. Anyway it will give you a starting point.
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