Miller, I smoked up a empty RWS 9.3x72R case and it gets stopped at the front of the case. If the 9.3x72R Sauer has a slight bottleneck isn't this what you would expect?
Only on two conditions.
1; The case being tried is longer than the chamber dimensions.
2; The case being tried has a larger dia neck than chamber dimenaions.
Since both cartridges in question are 9.3mm & both have case lengths of 72mm, I do not see either of these conditions occuring. The 9.3x72R is a rather low pressure cartridge with relatively thin brass, it would not surprise me in the least to see that the neck dia of a 9.3x72R Sauer actually had a neck dia a few thousandths larger than the 9.3x72R. The fact that the Sauer case is bottle necked simply means it is bigger behind the bottle neck, not that it is smaller in front of it.
The 9.3x72R dimensions were originally established around lead bullets & even when jacketed ones began appearing they were jacketed with a soft thin jacket. Most have quite deep grooves which means the bore size is relatively small for the caliber. I would not expect a 9mm bullet to fall through very many older 9.3 caliber bores.
