As per Mike Armstrong's suggestion I did write to Fred Zeglin and here is his reply:
Fred Zeglin <fred@z-hat.com> Wed, Sep 22, 2010 at 9:00 AM
Reply-To: fred@z-hat.com
To: mkbenenson@aol.com
Howdy,
As a rule if you stay away for the hot ammo from Norma and the "extended
range" ammo there is no problem.
SAAMI limits the pressure of 30-06 ammo to keep guns like your safe. So
long as it is in good condition and the headspace is set correct either
caliber would be totally acceptable in your gun. Of course 06 is only
possible with a new barrel.
We could have it rebored for you. The cost is $395 plus shipping. About
95% of all rebores work out just fine, but the risk is yours if the barrel
does not rebore. In your case I would tell them 35 caliber and if that did
not work they could still try for 9.3mm. Let me know what you decide.
I have written back to Mr. Zeglin to say I will not do it. I can control the ammo used in the reworked rifle but cannot control the next owner, who may be less careful.
