Small Base die

[Rtheurer]

Loading up some of my 280 AI Hunting ammo I have noticed that the area just at the .200 mark above the base or face of the case head has expanded enough to cause tight chambering. I have a Redding Body die that I did my best to get that spot pushed in a little (.0005) to get the brass back to feeding correctly.
This Rifle is one that I had done prior to specing my own reamers to match the Reading dies and solve all these types of issue. The real problem is that the 280 AI is so darn long and wide at the shoulder I don't have another die that is longer with a tighter base area to run the case into and rejuvenate it, if you will, the bottom part of the case that is to wide.

Hate that This chamber is a little tighter than my dies are. Makes it a lot more work than it needs to be.

Oddly enough this is the die I use to fix other shorter cases with this issue without touching the side or shoulder area. Maybe I should call John Widden and have him make me a straight 7/8" die with the correct bottom diameter to squeeze that area. Just use a boring bar all the way through and chamfer it.

Thoughts or Ideas???

Russ T

 

[CatShooter]

Try a 45 ACP sizing die...

 

[snowpro440]

I think that a Larry Willis die might help you . www.larrywillis.com/

 

[Dgd6mm]

Try a 45 ACP sizing die...

This works great, my buddy made me one, just use it yesterday. He took the top off of it. I use mine for my .308.

 

[Tim Singleton]

Could you cut the top part off of a 280 small base die? Make a home made ring die.
I've made them before cut them just above where the lock ring will set

 

[BoydAllen]

Have the chamber polished out to a slightly larger diameter at the back...easy fix....end of problem.

 

[Ggmac]

It is less expensive and easier to use a 45ACP carbide , it can be used for any 30-06,308,243 ,etc
Gary

 

[GSPV]

When you use a ring die, where does the brass displace to?

 

[Dgd6mm]

It is less expensive and easier to use a 45ACP carbide , it can be used for any 30-06,308,243 ,etc
Gary

Ggmac made mine. Thank you Gary.

 

[CatShooter]

When you use a ring die, where does the brass displace to?

Back where it came from...

 

[dkhunt14]

When you use a ring die, where does the brass displace to?

I believe it is the same as a regular Full length die. If your die is too big and don't size the case; you either have to get a custom die or make a ring die. The ring die is just a cheaper way to fix an undersize reamer. Matt

 

[Rtheurer]

I really didn't think I would get a good response on this. Good Ideas fellas. The true fix is to polish out the back of the chamber as the good Mr. Allen pointed out. Ring die might get me going till I can get that done without costing a bunch of money.
This is why I spec my reamers to match the FL die and not the other way around.... Little late on this one. You have to pay for the reamer already..Might as well make it fit the off the shelf FL die the first time. uhhhg.
RT

 

[expiper]

Russ,,,,remember that the 280/270/30-06 class of ctgs is not the same dia at the .200 line as the .308 family of ctgs,,,,know your dims before you buy/make more dies that dont work,,,Roger

 

[Ggmac]

They may not be the same dimension , but from experience all manuf I 've checked have much smaller base sizes than listed . The Lee will size .466-.467 , then I would neck oe Full lenght as usual .
I think the brass bean counters are holding back whenever they can .
Hey I dont have an interest $ in Lee , but its a solution .

 

[fguffey]

My shell holder have a deck height of .125", then there is the radius of the die. By design there is a limit to the amount of case head that can be sized. then there is case head thickness. I have thousands of 30/06 military surplus cases with a case head thickness of .200". I have R-P 30/06 cases that have a case head thickness of .260". When I have case heads that upset to the point the case head will not chamber I start worrying about what I am doing wrong, always. The only way I can upset/crush a case head is overpressure. I can upset/crush a case head by hammering the round with a heavy load.

I have tested suspect receivers, after firing the head stamps are not readable and the primer does not come out with the ejected case. I have had case heads expand .014", not only did the case head expand, the flash hole also expanded along with the primer pocket.

I have a set of RCBS 30/06 dies that are smaller in diameter than a small base die, I know small base dies sound cool but shoving the .260" thick case head into that die the small base die will bend your press. Sizing the thin .200" thick military case head into the same die is easier, sizing solid brass is more difficult than sizing solid brass.

Then there is the rifle receiver design.

F. Guffey

 

[GSPV]

When you use a ring die, where does the brass displace to?

Back where it came from...

If the forces are from the same direction as in firing, that's going to be true. If they are not, the brass will go where it wills. That may or may not be what you want.

 

[bigedp51]

Rtheurer

1. What brand brass are you using?

2. What is the base diameter of a unfired case and what is the base diameter of the problem cases

I just sized a .fired .308 case in my RCBS carbide .45 die and got between .466-.467.

 

[CatShooter]

When you use a ring die, where does the brass displace to?

Back where it came from...

If the forces are from the same direction as in firing, that's going to be true. If they are not, the brass will go where it wills. That may or may not be what you want.

My brass is better behaved than yours.

 

[bigedp51]

My brass is better behaved than yours.

Sorry CatShooter but I'm going to ask your wife about that one.

 

[FatBoy]

Russ,

You know at least a half dozen guys lathes. If you have a reamer why not set it back a thread or five?

Chris