August 21, 2007, 01:35 PM | #1 |
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7.5x55 Reduced Load
I am looking for reduced load data for the 7.5x55 Swiss that I will be using in a K31 rifle.
I will be using Sierra either 155 Palma, 168MK or 175MK bullets. I have good success with using 4795 in a 308, using Sierra 155 Palma and 25gr of 4795, from 100 to 385 yards and am trying to determine if I would use similar loads for the K31. Al |
August 21, 2007, 08:08 PM | #2 |
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I'm not aware of anyone who is reducing the Swiss round. My advice would be to call the powder manufacturer and see what they have to say.
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August 21, 2007, 09:40 PM | #3 |
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I'm showing a max of 21.0 grs SR4759 with the 150 bullet. Start data at 15.0 grs. Caution should be used and start plenty low and work up. SR4759 is a favorite of mine but it can spike pressure in a hurry. Load at your risk.
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August 21, 2007, 10:26 PM | #4 |
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I use a reduced load, but with a lighter bullet. Speer 110 gr. plinker over 25gr. of H4198. Runs about 2,000fps, or about M1 Carbine level.
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August 21, 2007, 11:27 PM | #5 |
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Yup, SR-4759 is a great reduced powder, but overloads can get interesting very quickly. 21 grains sounds kinda low. The 30-40 Krag has a max load of 24.5 grains of SR-4759 + 150 grain bullet and that operates at a far lower pressure than the 7.5x55 pressure limit, 37,300 CUP according to the IMR website. 21 grains of SR-4759 and a 150 grain bullet should be a good starting point for a plinking load. You should be able to gradually work your way up to the max for the 30-40 Krag and still be safe.
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August 22, 2007, 06:44 AM | #6 |
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I use 21.0 of Accur 5744 with a 170 grain bullet, it's cast but still produces great accuracy. You can certainly use that as a reduced load with jacketed as well. I think you should try it, you'll be surprised.
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