Mr. John Goens sent me a strip of the tape he uses and it came in the mail this morning.
I've read his report on this bullet with 6 grains Unique in a 38 special case and I've been loading it but with a 358477 150 grainer.
It is a shooter for sure. (NO, I WON'T ARGUE THE SHORT-LONG CASE DEBATE AT ALL!)
The 358429 does very well in my S&W 686 4" with 7 grains Unique in a 357 mag case.
Thank You, Mr. Goens.