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Old December 30, 2013, 11:22 PM   #1
Texascoonhunter
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Re-sizing 270 up to 30.06

Hello to All. I have been in the woods since early October and have not been on for a while. Anyway I have a question. What are the hazards of sizing 270 brass up to 30.06 and loading it ? Cartridge is same length, diameter except for the neck size. Has anyone done this. If so how did it work out ? Got my hands on a few 270 brass but don't shoot a 270. I do shoot the 30.06.


Thanks in advance for all replies
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Old December 30, 2013, 11:37 PM   #2
w748
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'06 is the parent case for the .270 , no reason it won't go back. You usually have fewer problems necking up than necking down.
Never did an '06 from .270 but have done hundreds of '06 to .35 and .223 to 7mm , just do all the usual safety stuff.
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Old December 31, 2013, 12:23 AM   #3
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It'll be fine. I've never done the .270 > .30-06, but I have a .308 and recently picked up a bunch of once fired .243 brass at the range. I took it home and resized all of it. It fights back a little as it goes through the resizer, as the expander ball is initially too big for the little hole. I actually had to switch dies from the RCBS, to my rarely used Hornady die, because its expander ball was more gradually sloped, and made the process much easier than the RCBS did. Resize, reload and shoot. Have fun.
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Old December 31, 2013, 07:25 PM   #4
5R milspec
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Always mark the brass just to keep anyone from making a mistake one day. Hate to hear one day that someone like a friend picked it up thinking its a 270 and some how gets hurt trying to chamber it in their rifle. I know how hard it would be to chamber a 30/06 into a 270 but some people just don't take the time to look as close as one should.

On a second note I wouldn't do it unless your hurting for brass. I was a brass hog ounce and even did what you are asking about, but found it really wasn't something needed to do. Now I just hold onto it for a friend if in need or pass it on as scrap.
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Old December 31, 2013, 07:27 PM   #5
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You will need to trim because .270 is longer by a good bit.
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Old December 31, 2013, 10:28 PM   #6
Texascoonhunter
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270 up2 30.06

I want to thank all of you for your replies with advice and experiences. I will weigh the pro's and con's on this. Hope all have a Happy New Year and good health !
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Old December 31, 2013, 11:17 PM   #7
Sure Shot Mc Gee
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Chances are you won't get many reloads from them for all your effort. Because of split necks. But they'll make good shoot and leave laying shells.
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Old January 1, 2014, 12:24 AM   #8
GeauxTide
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Not so fast. The 30.06 is 2.494" and the 270 is 2.540. Minimum is trimming .046.
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Old January 1, 2014, 04:11 PM   #9
Pathfinder45
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Trade Brass

It works a lot better the other way, '06 sized down to 270, because it doesn't ever need to be trimmed. But you can use it OK if you trim them properly. Evidently, the 270 is actually based on the 30-'03 cartridge, so the necks are longer.
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Old January 1, 2014, 11:29 PM   #10
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30-06 brass is pretty abundant... Just saying.
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Old January 2, 2014, 02:33 PM   #11
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Really no point to it, worth it for the rare hard to find or non existent but the brass does take a bearing stretching it that much as something has to thin out (going up).
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Old January 2, 2014, 02:49 PM   #12
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One thing to consider is the change in length that will likely take place. I have gone done this with .357 sig and .40 and the case length changes going both ways.

I did it mostly out of curiosity after a discussion with my buddy (neither of us knew) and didn't think the length would work going .40 to .357, but the case length grew with necking down the .40. Almost perfectly. Only an academic adventure and I tossed the brass.

My guess is the .270 brass will get shorter as the .357 sig shells did for me. It's been a couple years, but as I recall, the brass shortened about .012"- barely within spec.

PS the Lee easyX is *very* nice for an operation like this.
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Old January 2, 2014, 03:09 PM   #13
markr
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Quote:
30-06 brass is pretty abundant... Just saying.
For that matter, loaded 30/06 and .270 ammo seems to be cheaply and readily available at every big box store in town.
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Old January 2, 2014, 03:24 PM   #14
chris in va
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I reload for my Garand. It's very easy to neck-up 270. Resize using your 30-06 die then trim down to 2.484". There is a fair amount of extra neck length on the 270 case but not absurd. I've reloaded and fired a couple dozen with zero issues.
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Old January 2, 2014, 08:38 PM   #15
James K
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The assumption that the parent case for the .270 is the .30-'06 is wrong. The parent case for the .270 was the .30-'03, which is why the .270 case is a tad shorter than the .30-'06 case.

Jim
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Old January 2, 2014, 09:26 PM   #16
William T. Watts
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I necked up (5) rounds of 1x FC 270 cases to 30 cal, after necking up and full length sizing the cases were trimmed and checked in a L.E. Wilson cartridge case gage. Even necking up and full length sizing the cases not a single case failed with an additionally four firings, no necks split/cracked nor primer pockets opening up or leaked. I felt comfortable enough to neck up, size, trim an additional 60 rounds and load for my grandsons 30/06. I'm not sure I would have wanted to do that with R-P or W-W cases because their brass is a bit harder. None of the 65+ cases I worked with failed! William




Pathfinder is correct about the 30/03 case being the parent case, the early military rifles that had 30/03 chambers had one thread remove off the shank and rechambered with the shorter neck!

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Old January 22, 2014, 09:44 PM   #17
Texascoonhunter
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270 up to 30.06

This was a very interesting post to me. I received lots of information. A person cannot gain all of this experience by their self in short order. It takes lots of time. So my hat is off to those of you who posted replies. Again I want to Thank YOU!

GOD BLESS AMERICA
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Old January 23, 2014, 12:44 AM   #18
Pathfinder45
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A practical application.......

Suppose you have an 1895 Winchester in 30-'03...... You could simply use 30-'06 ammo. But say you want to reload and use correct length cases.......You'd likely be hard pressed to find real 30-'03 cases. No worries, just use necked up 270 cases. And that, my friends, is the beauty of reloading. Now, 33-WCF is a little more difficult, but I want one.
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Old January 23, 2014, 01:42 AM   #19
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I have only turned 30-06 to 270, but not the other way around.

I have read some 260 Remington mythology:
a) 260 brass made from 308 brass, has thick necks that may pinch bullets and make a pressure spike ~10% of the time.
b) 7mm-08 brass makes the best 260 brass for sloppy SAAMI chambers.
c) 260 brass makes the second best 260 brass.
d) 243 makes lousy 260 brass because some shoulder turns into neck making a doughnut. But only Lapua brass needs reaming and RP brass does not.
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