Lew - I have this box style for three different loadings - 147 grain JHP Subsonic, index AB5147; 115 FMJ Ball, Index AB5115; and 158 Grain FMJ Subsonic, Index AB5504. Note that the last one has an Index number that is not simply “5” followed by the bullet weight.
115 Grain FMJ" 92 9mm
147 Grain Subsonic: ABT 9MML
158 Grain Subsonic: Box received empty
I only have one round in each box, my style of keep them as you know, but I can tell you that they were not mixec brass, or I would have kept one of each headstamp in the box. I could be wrong, but I don’t recall ever seein any ABT round loaded in an IVA commercial case.
Interesting to hear that ABT is still in business. Do you know what their current headstamp(s) is (are)?
I seem to recall that many of their loads were in Winchester (W-W 9 mm LUGER) brass, but have not check my collection. Some of my rounds from this maker are at Tucson.