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Old January 28, 2013, 05:05 PM   #1
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75-77gr loads using Benchmark

Hello all,

I am working on some heavy loads for my AR's chambered in 5.56.
I have a ton of Benchmark powder, and have been using Hogdon's load data.

I would like to know if any of you are using Benchmark for heavier loads, an what your load/veloctiy/accuracy is.

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Old January 28, 2013, 07:01 PM   #2
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Benchmark is a little too quick burning for the 77 gr bullets.You will be at high pressures before you get the 2700 or so fps you probably are looking for.

My brother has a nice shooting load for PD's using Benchmark behind a Nosler 60 gr Varmint Ballistic tip.I do not know the charge weight.
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Old January 28, 2013, 07:05 PM   #3
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My thoughs too,what other powders do you have.

If you have any R15 Varget 4064 4895 I think you will be happy.I have on-unce found a load with 4007 but walked away from it.But I know where your coming form,you have so use it.
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Old January 28, 2013, 08:05 PM   #4
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I don't think that I would discard the idea of using Benchmark. I've used it for 77 grain Noslers but I don't have the data handy and I don't want to guess. The accuracy was very good but I'm not sure about the speed. It may not be ideal but if you have a lot of it give it a shot. With components hard to find now it is a good time to experiment.
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Old January 29, 2013, 12:13 PM   #5
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For 77gr jacketed bullets, the Lee manual suggests a starting load of 20.5g of Benchmark. NE load is 23.5.
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Old January 29, 2013, 12:41 PM   #6
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For .223/5.56 loads all I have is benchmark.

I've worked up the load to around 2650 fps out of a 16" barrel.
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