Barrel shank size

[redneck1]

A simple question ... is 7/8 a large enough shank for a .223 barrel
Or should I go to 1inch

[Artful]

Are you building your own action?
Or trying to stub with an existing barrel.

[redneck1]

My own action
7/8 allows me to buy a 1 inch blank barrel and be able to work with it in my lathe .

For a 1 inch shank I'd be stuck with an 1-1/4 inch barrel blank that wont fit threw my head stock and I'd have to cut it shorter then I want to work on it

[pietro]

A simple question ... is 7/8 a large enough shank for a .223 barrel
Or should I go to 1inch

AFAIK, the nominal barrel shank size would be 1.05", so a 1" barrel shank should suffice.

If your action won't accept a barrel with a 1" shank, IMO your best bet would to propose your question to a barrel maker (Douglas, Liija, etc, etc).


.

[ulav8r]

A 1 inch blank could be threaded 1x14-16 and used with a nut similar to what Savage uses and that would be stronger than the 1/16" shoulder that would be left if threaded 7/8.

The aesthetics might not suit your taste.

[Wolfer]

I'm of the opinion that a 7/8" shank is big enough for a 223. Look at a Turkish Mauser for example

[EDG]

Check the thread size of the small Sako action. I think it is 22 mm or .866 diameter

A simple question ... is 7/8 a large enough shank for a .223 barrel
Or should I go to 1inch

[redneck1]

I think small ring mausers are around .980 dia ... I could be wrong though .

But I did some more searching and found quite a few actions that use 7/8 dia or smaller for the barrel shank .

For example the Mossberg mvp in .223 uses a a 7/8 shank .

I feel fairly confident that this is a safe compromise to make and be able to work within the size limitation of my 10x22 lathe .

[BK7saum]

Thompson contender barrels are 0.810" I believe, and come in .223.

[kywoodwrkr]

I'd try and read through this.
http://www.cip-bobp.org/sites/defaul...e/A-4-1_EN.pdf
Page 3 defines the category of the steel as I understand it.
Compare your barrel steel to steel composition noted there.
Page 6 for a starting point. (223)
Cat 2 looks like softer steel ??
1mm=.03937" 5mm wall = .19685 Base 223=9.61mm=.3783
.19685+.3783+.19685 = .771" dia.
As sanity check, evaluate 22 liner barrels against the chart. (.3125 Dia - .224)/2 =.0885 =2.24mm wall thickness
Chart dictates 1.2mm so 2.24 safety factor of almost 2.(1.866666.....)
Disclaimer: I did not stay in a Holiday Inn last night!

[redneck1]

As luck would have it I got an answer back from the barrel manufacturer after almost a three week wait .

7/8 is well within the safety margin

[Jedman]

Marlin uses barrel shanks about .100 smaller on a M 1895 in 45-70 so for a 223 your fine.

Jedman

[gzig5]

Cooper uses a 3/4" shank on at least one of their rifles in .223. I have a factory take off I'm going to adapt to something else. Looks like plenty of meat around the chamber to me.