Resizing 30-06 to 270.

[arakboss]

I have a ton of 30-06 brass but very little 270 brass. The interwebs seems to think there may be problems with neck thickness and neck splitting when resizing 30-06 to 270. Anybody here had experience with this conversion? Was neck thickness a common problem? Were certain brands of brass better than others?

I want to avoid having to do any neck turning or annealing, if possible.

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[NeoBlackdog]

.270 brass is relatively inexpensive.

GunBroker.com - Error

 

[arakboss]

.270 brass is relatively inexpensive.

GunBroker.com - Error

I do have some on order, I picked up for .42 each shipped. The 30-06 brass is relatively free

 

[Stomper]

Would annealing the neck and shoulder mitigate the stated issues?

 

[orygun]

Would annealing the neck and shoulder mitigate the stated issues?

Annealing would help guard against the brass cracking but wouldn't move the metal away from the neck.
I don't have a clue as to whether the case neck would be too thick once necked down to .270 from 30 cal.

 

[oremike]

You do you, but I don't like the head stamps to be different than the actual. If you wait a bit or post a wanted add here you will most likely get all the properly head stamped brass you need. If you want brand new Starline has 270 brass in stock with free shipping.

 

[Stomper]

Annealing would help guard against the brass cracking but wouldn't move the metal away from the neck.
I don't have a clue as to whether the case neck would be too thick once necked down to .270 from 30 cal.

Mismatching head stamps aside as WISELY aforementioned, couldn't you then run a .270 ball expander through the neck and maybe thusly stretch the neck to thin it out, then trim the length?

 

[JRuby]

People make 25-06 out of 30-06 as a standard practice. The problem with 270 winchester is that it is longer than 30-06. Just like 280 remington is. I would wait on the 270 brass.

 

[arakboss]

Would annealing the neck and shoulder mitigate the stated issues?

Maybe the neck splitting?

 

[front_sight]

I made 25-06 brass out of both 270 and 30-06 brass. Definitely had to trim it but did not run into problems with chambering due to neck thickness or neck splitting. However I never fired them more than twice after conversion so I can't speak to their longevity. If you want some 270 brass I have some once-fired Remington I would be glad to sell you cheap as I no longer have a rifle for it.

As an aside, I just had to pull apart 75 rounds of 308 that I had loaded into fully prepped cases. The cases were Lake City 1967 that I have had since the early 1990's. I suspect they may have been fired in a M60 but they had worked ok for a couple of reloads. I went to shoot them at the range and discovered that a third of them had splits in the neck. I don't think they were that way when I reloaded them 10 years ago. I think they actually split while sitting in plastic MTM boxes. The bullets were Sierra 150 gr Matchkings BTHP match which measured exactly .308 - but they were moly coated by me (back during the moly-coating craze). Oddly enough other loads using the same lot of cases but different bullets did not exhibit the cracks. Leaving me to wonder if there was something about the moly coating that reacted with the brass cases. Hard to imagine but the lack of cracks in similar cases loaded with different bullets seems to isolate the moly as the only difference. But I suppose it is possible that those cracked cases were reloaded more times.

Anyway, the takeaway is that yes you can definitely work-harden cases by sizing them too much / too many times.

 

[Joe13]

Just because you might be able to do something doesn't necessarily mean you should.

Why reinvent the wheel?

 

[bcp]

I don't mind reinventing the wheel, but I get tired of reinventing the flat tire on my projects.

Bruce

 

[ar addict]

I think we have some cheap 270 brass. I will check for you.

 

[orygun]

The problem with 270 winchester is that it is longer than 30-06. Just like 280 remington is. I would wait on the 270 brass.

This isn't correct. Measuring to the outer end of the shoulder 25-06, 270 Win and 30-06 all have the same measurement, 1.948". The 280 is .051" longer at that point, 1.999". I believe the reasoning behind this was to keep the 280 cartridge from chambering in a 270 rifle.

 

[JRuby]

This isn't correct. Measuring to the outer end of the shoulder 25-06, 270 Win and 30-06 all have the same measurement, 1.948". The 280 is .051" longer at that point, 1.999". I believe the reasoning behind this was to keep the 280 cartridge from chambering in a 270 rifle.

I am not talking about the shoulder I am talking COAL 270 winchester 2.80" 30-06 is 2.484" according to Hornady reloading mnanual

 

[bcp]

I have a ton of 30-06 brass but very little 270 brass.

The proper answer, to the problem of a ton of 30-06 brass, is to buy a 30-06.



Bruce

 

[arakboss]

The proper answer, to the problem of a ton of 30-06 brass, is to buy a 30-06.



Brucer

I have a couple.

 

[ar addict]

I found a coffee can full mixed head stamp some primed,
unknown by who or when. unknown how many times fired.
$2.50 lb.
Now, if you want to come up here and sort a few buckets
of brass. I will make you a screaming deal on brass.

 

[NeoBlackdog]

I am not talking about the shoulder I am talking COAL 270 winchester 2.80" 30-06 is 2.484" according to Hornady reloading mnanual

The .270 was derived from the .30-03, not the .30-06, thus the extra length.

 

[RVTECH]

I understand the need to possibly reform brass into certain calibers, especially those that are rare, obsolete etc. but if a caliber is fairly common I believe the best thing is to find the proper brass for it.

Case in point. In my 'early days' of reloading I tried 'reforming' .308 Win brass into .243 Win.

Well, I ran into problems with not all of the loads chambering (or tight) due to case neck thickness being inconsistent but this was partly due to my inexperience at the time and it didn't take me long to realize the 'error of my ways' and simply find 'real' .243 Win brass to load with.