Just looking over various books and other sites, and I found these two cartridges. I have heard of both of them, but have not seen much of them around. My 2nd Edition of Modern Reloading says the 9.3X62 was devoloped in 1905. It has nothing on the 9.3X64. I looked at the dimensions on the 62, and they are very close to the .30-06 at the head, but open up a bit closer to the neck. I would imagine that brass could easily be formed from 35 Whelen brass with relative ease. Does anyone have any experience with either of these two cartridges? Just a curiosity thing, who knows if I will ever have one, but just would like to find out more about them. Thanks.

Edit - Just looked some more, and CZ does chamber the 550 American in the 9.3x62, so it must still be fairly popular somewhere, lol.

I am a custom gun smith and have built rifles in both chambering and believe me there is a big difference in the two. The 9.3X62 is verging on the .338 and yes you can use 35 Whelen bress to form it however the 9.3X64 is on a par with the .375 H&H and a very big step above the 62. Do not get me wrong, both are great cartridges but the 9.3 X 64 is far hotter.

I've used both, i also made 9.3 bullets for sale for a long time.

9.3 bullets are .366" in diameter, and these days there's some pretty good choices in that diameter.

Drilling Man

I have found myself in a similar positions, trying to decide between the 9.3x62 and the 9.3x64. I think that brass is a lot easier to come by with the 9.3x62 but the x64 is a lot more powerful and it also fits in the same action all standard length cartridges. I'm thinking about having a 9.3x64 built up with pattern 17 enfield, should make a heck of a moose/bear gun.

I am just trying to find something to fill my medium/big bore hole that I have. I currently have a .223, 2-.30-06's, an 8mm Mauser, and thats if for centerfire. I plan to get a 45-70, and want something in between the 06 and 45-70. The 45-70 will probably come first, but I want something in mind if I ever do get a medium bore also, although my hunting will probably consist of animals that will easily be taken by the .30-06, it would be fun to have another gun in the closet. I would like to hunt grizzlies or browns, but the cost is just unreal, so it would probably be more practical to actually borrow a larger bore for the once in a lifetime hunt. I figure the 06 will handle all of my elk, moose, and caribou hunting I will ever get to do. The 45-70 would be a special purpose gun for anything that gets hunted in really thick cover, or from a stand, etc. So in all actuality, I probably will never NEED a medium bore, but it would be fun to have, lol.

Thanks for the info guys!!

Think of it this way, the 9.3x62 is a 35 Whelen, and the 9.3x64 is a 375 H&H. That's really what they are compared to in "common" rounds here in the states.

Also that's the "power levels" they are at too.

Drilling Man

The 9.3x62 is popular in Africa. Some of the countries there that say you must use a 375H&H or larger round for hunting dangerous game, allows the 9.3x62 to be used.