They are basically the same as a LR 98 except using SR threads. I find that most have a shank about .625" to .630" long. Much of that depends on how much material one removed from the front of the ring when truing and/or removing the lip.

On this same forum I was told the ring was .705 long if you just took off the lip.

I have threaded and short chambered several barrels for Turkish 98, small ring thread barrels. I have made the threaded shank .705 inch long. A customer contacted me and said that there was a gap of about 1/8 inch at the sholder when installed on his action. Were these actions made with differing lengths on the front ring?

You were told wrong. At least in regards to the K.Kale marked Turks. The 1903 may be different but it is a relative rarity when compared to the vast numbers of K.Kale 98's on the market. I don't own and have never seen a 1903 so I cannot comment on its dimensions. Your reports of 1/8" gaps would seem to support my findings.

How ya doing Parryj.

As a rule of thumb, I thread my differant Mausers as followed:

Belgian Mauser M-1889:
BBL.Dia. - 1.115'
shank lenth - .760"
Thread shank dia. - .995
12 tpi, v type

M-1888 Ger. Army Commission
Shank lenth - .720"
thread shank dia.- .987
12 tpi, v type

M-1891
bbl.shank dia. - 1.289"
shank lenth - .830"
threaded shank dia. - .980"
Approx. 12 tpi, V type

Mauser M-1898 sm. ring, Mex.98 type,& M-G33/40
shank leanth - .625"
threaded shank dia.- .980"
Approx. 12 tpi v type

Mauser M-98 standard Lg. ring
shank lenth - .625"
threaded shank dia. - 1.100"
Approx. 12 tpi V type

Mauser M-1895, Swedish Mauser M-94 carb.& 96 rifle
shank lenth - .645"
threaded shank dia. - .980"
12 tpi V Type

I hope this helps ya some what.