doublegunshop.com - home Forums General Discussion German & Austrian Sporting Guns @ doublegunshop.com 9.3mm x 72mm R - CAST SLUGS (PROJECTILE) SOURCE

Mike, I found this discussion on the Cast Boolits discussion board just this morning. http://castboolits.gunloads.com/showthread.php?75108-9-3x72R&s=1c8d7bfae4fd492f551a47597ee3e683. It appears that some Austrian gun makers made their guns 9.3x72R with a 2-taper chamber so that they could sell proprietary dies and ammo. Based on this and the fact my full length resized rounds won't fully chamber I suspect my gun may be one of these. Regards, Doug K

Doug K:

Just curious but have you made a chamber cast to verify any of the oddities?

Cheers,

Raimey
rse

DougK
Actually, there were different versions of 9.3x72R available, 9.3x72R D (Deutsch), 9.3x72R E(English), 9.3x72R N( NORM.- standardized)( this was designed to fit most of the others and allow easily reaming the chambers of the rest to fit), and 9.3x72R S&S (Sauer and Son)( an entirely different cartridge based on a larger diameter case). From your description, it seems you may have a "D" version rifle, which is the "2-taper chamber" mentioned. Modern ammunition is the "N" version. Of course, absent a chamber cast, there is no way to know what you have. In my experience, if a cartridge is fired in a "D" chamber( by resizing or forcing it in), then it is fireformed to the chamber and can be loaded with "N" dies, which would function as neck sizing dies. If your load expands the head diameter enough to make chambering difficult, it is likely too hot. I suspect it is something else causing the interference. You can "smoke" a case or color it with a magic marker and push it in with some force. When you extract it, it should show the location of the interference. You might be surprised how many 9.3x72R reamers exist.
Mike

Here is one cheap trick
Get a second shell holder, grind a few thousandths off
the top of the holder so the die can sit lower.
See how this works for your firearm.
Mike

DougK,
You can do the same thing Skeettx mentioned by putting any flat piece of steel on top of the shell holder to push the case all the way up to the rim, into the die. You can do this to see if that is the problem, then decide what to do about the shell holder. A thinned shell holder and stuck case=busted shell holder. BTY, if you try either suggestion, remove the expander so you can drive a stuck case out. I use a "pusher" I made up with a flat top and the bottom like a shell holder, it works for everything ( but I have to drive all cases out). On reflection and going back to your first post, I wonder if using a 250gr bullet in a chamber cut for a 200 or 193 gr bullet is the cause of your problem. I suggest you smoke the bullet of one of your handloads and chamber it. When you extract the cartridge, check the bullet for bright marks caused by the lands in the barrel.
Mike

Der Ami and Skeetx, which size or caliber Lyman M die do you use with your 9.3 x 72r for reloading?

Thanks, Ron

Apparently Midway doesn't carry it but Lyman does make a 9.3 M die.

I think it could be a good idea to contact Lyman directly. Some folks have reported ordering the particular size that they want for a very modest price. I'd figure out what basic expanding diameter I'd want and then let Lyman pick the diameter of the larger step. Could maybe let them know how deep the bullet will be seated, unless someone wanted it deep in the case past the neck. Sometimes the cast bullet is larger than the bore diameter, for good reason, and the expander could be sized for the bullet and not just generically for the stamped caliber.

Ron,
I just use an "M" die body I had on hand with a "shopmade"(read home made) expander stem, made to fit the bullet and bell the case. I just left the expander stem in the sizing die, but with a smaller( don't remember diameter)expander button; just to hold the depriming pin in. Sometimes I deprime by hand and leave the stem out of the sizing die.
"A lathe is a requirement of life"
Mike

Thanks everyone for the suggestions on the M dies. I have a small lathe so was thinking about trying to make my own expander stem. Didn't seem like a difficult project.

Ron