Hoser-


You can agonize over this forever -- there is an infinite number of possible combinations of cartridges for you to waffle over...


There is nothing wrong with either cartridge.
The 30-06 is a great choice - and it's perfect for everything you're talking about ever hunting.
There is and will be much more 30 caliber ammunition to you cheaper than the 9.3 and you might (very well could) luck out with with factory copper solid ammunition.

Both Merkel and Chapuis are capable of (gunbuilders do it all the time) building and shipping you a rifle that will extract or eject 30-06 ammunition reliably and consistently - and if for some oddball chance the factory rifle doesn't work out it's WARRANTIED so you're sitting pretty anyway.

There are thousands and thousands of perfectly functional ejector rifles popping 'rimless' brass out upon opening with MONOTONOUS RELIABILITY - to the point where here/now in the 21st Century, it's a total non-issue.


The life-cycle costing of the 30-06 (with the same round count) will be far cheaper than the 9.3mm rifle.
You might not end up shooting the 9.3mm rifle nearly as much as you would with the 30 caliber rifle though, because the recoil is much more energetic and much more brisk -- and the cost per shot is so high.
Forget about 'cheap practice ammunition' with the 9.3 as you don't seem to want to reload.


Just get the 30-06
You'll love it, you'll love to shoot it, and once you finally get it and realize how sweet it is to handle and run a small-caliber double rifle, you'll realize that it's worth it to take whatever plunge you need to take to start handloading for it -- where you'll find the fun really begins...




I look forward to your soon-to-occur decision.
May you enjoy your slick light little 30-06!!


By the way, for this first double rifle, forget about custom chambered rifles for such cartridges as the 7.62 X54R
If there is a cartridge that can go bang, there's a gunmaker who can wrap a rifle around it.
You'll pay.
Save that for later.
Get running with a nice production rifle now, then figure out what your custom rifle dream is later in life -- when you can afford it...



Cheers
Tinker