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Making .270 out of 30-06 brass?

 
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  #1  
Old 02-07-2010, 01:09 PM
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Making .270 out of 30-06 brass?

I ran across a deal on some unfired Lapua 30-06 brass, and I'm going to re-size it to .270 Win, for a good spring project. Is there a preferred method to ensure the neck thickness stays in check?

My current thoughts are:

1)Use my FL bushing sizer die w/ a slightly larger bushing so that the larger OD will compensate for the thicker neck and end up producing the same ID. I'm trying to duplicate the same amount of neck tension of my current load.

2)Then trim the brass and turn the necks to the same thickness of the .270 brass that I have been using.

This makes since in my head but I'm unsure if this is the correct way to do it.

If this will work, about how much thicker will the necks be after being sized down?

I currently use a .302 bushing on brass with .013"-.014" neck thickness.

So maybe order a .303 & .304 bushing??

Feel free to correct me if I have this upside down
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Old 02-07-2010, 01:49 PM
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Re: Making .270 out of 30-06 brass?

I did this with a bunch of lapua 308win win brass necked it down to 6.5. I just ran it through my 260rem die and I was done. It looked a little funny at first but after I trimmed it to length and fired it one time it took the wavy part out of the neck and it looked great after that.
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Old 02-07-2010, 02:27 PM
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Re: Making .270 out of 30-06 brass?

Run it in your .270 FL die and shoot it. It will be neither too long nor too thick for a factory chamber
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Old 02-07-2010, 02:29 PM
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Re: Making .270 out of 30-06 brass?

You will want to wait for someone who has done this to advise you (I haven't), but the neck of .270 brass is 0.045" farther forward than the '06 brass. The finished product will need fire-forming, and case length may come up a little short; doesn't mean that it can't be done, only that the finished product may not meet expectations. Take a look a the drawings in a loading manual.

Last edited by Winchester 69; 02-07-2010 at 02:32 PM.
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Old 02-07-2010, 02:46 PM
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Re: Making .270 out of 30-06 brass?

Stalker, 30-06 brass is 2.494 in length and 270 Win. brass is 2.540 so the brass is going to be short even though you'll gain some length in the sizing process. The necks won't get much thicker, maybe a .001.
It's going to leave a big gap between your lead and case mouth, which can cause problems with bullet jackets swagging into the gap, before entering the bore, depending on bullet type.

RHB
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Old 02-08-2010, 01:34 PM
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Re: Making .270 out of 30-06 brass?

Thanks for the input. When I re-size should a use a lot or just a bit of lube? I've read about doing it both ways. I'm using Imperial wax.
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Old 02-08-2010, 02:36 PM
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Re: Making .270 out of 30-06 brass?

A light ,even coat is all you'll need. Too much can put dents in the shoulder face. After you size the first case, with the press handle still down, screw the expander button rod up until the button touches the bottom of the neck, then back it off 1/2 turn and leave the rod loose so the button can float when pulled through the neck ( well lubed inside neck ). This will help keep the necks straight for the rest of the process. Good luck!! --- RHB
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