OP, it's to bad 9.3 bullets are so expensive. It leads to posts like your's
The big mistake made by most people who purchase such large diameter rounds is not considering WHY WAS THE ROUND CREATED IN THE FIRST PLACE?
The 9.3mm diameter cartridges (appx .366in) don't have a lot to offer over North American 338 or 35 caliber bullets. Not only that, there is a much larger selection to choose from and usually several will shoot well in any given rifle.
9.3 caliber rifles are a different ball game, in that bore diameters, although within spec, can be either large or small. This usually happens with older rifles, and I haven't seen a modern rifle with such issues.
People have become used to the trend created by CNC machine tools, used on an industrial scale to produce firearms. Todays firearms are incredibly consistent from one to the next and even between different manufacturers.
I had a very nice Yugo, Zastava, M70 chambered for the 6.3x62. It shot everything but the heaviest bullets well, due to its rather slow twist rate.
I still have a Drilling 16X16/9.3x72R. It was made before WWII and shoots bullets it like well. So far, it likes two,
The one it likes best is the 255 grain, Safari Raptor from Advanced Precision Technology, available from Intersurplus, a banner supporter and 230grain 9.3mm Lapua, which have been discontinued. I don't believe APT are available in Canada at this point in time.
The Drilling will not shoot anything else well, other than cast bullets .370 diameter.
I've likely got more than enough bullets for this combo rifle than I'll ever use. I only want to take one Deer with it and all will be well.
There seems to be a lot of trees between the Deer lately.
The one thing different between the two rifles, other than the Drilling has a slightly larger bore diameter, is the amount of FREEBORE.
The Yugo, Zastava M70 had just enough FREEBORE that I could load the bullets to touch the leade and still fit into the magazine well.
The Drilling, which was built for a different purpose, during a different era, has so much FREEBORE that it's impossible to seat a bullet out far enough to get close to the leade.
Many older rifles have very generous FREEBORE, along with sloppy throats. All of this makes finding the right bullet for the job tedious and expensive.
The 9.3x62 was meant to be an "all around cartridge" but many felt it was almost ideal for "dangerous game" Some felt it was to light and it's banned for such use in some African nations.
9.3x62 twist rates vary as well. I've come across them with twist rates from 1-11 all the way to 1-15, and this will also determine which bullet your rifle will shoot well.