If you're on Lightfighter, here is a dedicated thread by Dr. Roberts that details the problem he saw:
http://www.lightfighter.net/topic/9-mm-147-gr-le-testing
He posted the same information on pistol-forum in an already started thread, which does not require registration to read:
http://pistol-forum.com/showthread....Soon-To-Buy-In&p=289886&viewfull=1#post289886
The rest of that thread is fairly interesting, too.
John Johnston of Ballistic Radio also saw less than satisfactory results in another thread, and doesn't seemed to have resolved the issue yet:
http://pistol-forum.com/showthread....7-grain-PT-9mm&p=269596&viewfull=1#post269596
I don't have Dr. Roberts's actual contact information, but I'm sure many people here correspond with him, given how he is a fixture in the community, and can help put you in touch with him.
Here's what the content of the post in question is:
So we had an opportunity to run some 9 mm 147 gr comparison testing for an LE agency, including gel and accuracy testing using a gen3 G19 with OEM barrel.
Had some surprising results.
9 mm Speer 147 gr G2 at 955 fps (accuracy 95-0x):
BG: Pen = 13.8”, RD = 0.53”, RL = 0.45”, RW = 147.5 gr
4LD: Pen = 20+”, RD = 0.35”, RL = 0.65”, RW = 147.0 gr (
all rounds failed to expand)
AG: Pen = 10.5”, RD = 0.65”, RL = 0.54”, RW = 147.5 gr
9 mm Win 147 gr RA9B at 953 fps (accuracy 95-3x):
BG: Pen = 13.8”, RD = 0.55”, RL = 0.46”, RW = 147.5 gr
4LD: Pen = 15.5”, RD = 0.53”, RL = 0.50”, RW = 147.9 gr
AG: Pen = 17.5”, RD = 0.44”, RL = 0.53”, RW = 147.1 gr
9 mm Fed 147 gr HST at 998 fps (accuracy 96-4x):
BG: Pen = 12.5”, RD = 0.63”, RL = 0.42”, RW = 147.4 gr
4LD: Pen = 12.5”, RD = 0.56”, RL = 0.48”, RW = 147.5 gr
AG: Pen = 12.5”, RD = 0.63”, RL = 0.48”, RW = 146.6 gr
Bare Gel: Far left is Fed 147 gr HST control; top row is Speer 147 gr G2 PT, bottom row is Winchester 147 gr RA9B JHP
4LD: Far left is Fed 147 gr HST control; top row is Speer 147 gr G2 PT, bottom row is Winchester 147 gr RA9B JHP
While the bare gel results were as expected, this lot of Speer G2 did not fare well in the 4 LD testing. Keep in mind that early batches of HST had similar issues. ATK is sending out a new lot for us to re-test.
As usual, Fed 147 gr HST demonstrated outstanding performance--very consistent and highly recommended for LE agency use.