I read Elmer Keith's 1955 book Sixguns for the first time about 7-8 years ago. Just got around to trying this:
He briefly discusses this, almost in passing, as something other folks have been doing. . .
1. "They" had been loading the 160 grain hollowpoint version of the Keith SWC in the 9mm. What else could this be but the 358429 with a nose pin for making HP's?
2. "They" were sinking the bullet into the case so all bands were contained in the brass.
3. Charge mentioned was 3 grains of Bullseye.
My 358429 mold is an earlier one from NOE, marked as a 358429 - not with Al's later numbering schemes. It is running the three basically equal length, full-diameter bands, the square lube groove, and with the deep-cavity pins, it does in fact drop them right at 160 grains.
Knowing that this bullet would not leave much room in the case, and not being suicidal, I decided I would work the charge up from 2.6 grains. Since the standard 9mm seating die for round nose bullets was crushing the HP cavities inward, I used a flat-meplat seating die from a 10mm set. Worked great on the dummy set up rounds, but the noses got crushed when I put powder in. Reason: ain't no room in the case for both that bullet and 2.6 grains of Bullseye. As for sinking all the drive bands, forget it. I didn't get so far as figuring out exactly how much powder I could get in and still have the front band in a place that cleared the throat, but I suspect anything above 2.2-2.4 (ish) grains is going to be compressed to the point of not compressing any more.
On hand, I had CCI Blazer, Winchester, and a Brand X of brass. I used the Blazers because they were the lightest on the scale, so theoretically, had more internal volume. Ultimately, I did a small batch with a 1.8 grain charge, and another at 2.0 to chrono and jug test with. I'll get the test data up on those once I shoot them.
So I can only conclude from this experience that possibly:
1. Elmer was discussing another "Keith" bullet.
2. NOE was making something else.
3. 9x19 brass changed or Bullseye got bulkier since 1955.
4. Elmer put out some bad data.
Was wondering about the experiences of the Hive Mind with this.