garyb - like you, I carried CorBon 135 gr JHP for a few years, then I started to experiment a bit. I've been searching for test date, as I'm sure that DocGKR has tested just abiut everythng. I did, however, find the following test data on a post from DocGKR which includes 40 S&W 135 gr. PowerBall vs. 180 gr. HST. When PowerBall first came out, I switched to it during the winter months thinking it would better penetrate heavy clothing, and also thought it would better survive a trip through auto glass enroute to a car jacker.
I'll try to e-mail DocGKR today for info on the 135 gr JHP:
Let's review the critical data differences between Powerball and HST when compared using the same proven test methodology:
9 mm Corbon 100 gr +P PowerBall 1555 f/s from G17
BG: pen=10.9”, RD=0.60”, RW=93.9gr
4 layer denim: pen=11.4”, RD=0.58”, RW=97.5gr
The mighty 4.7” of pen after the auto windshield was not comforting…
9mm Fed 147 gr JHP HST (P9HST2) from G17:
BG: vel=1037f/s, pen=11.9”, RD=0.64”, RW=147.8gr
4 layer denim: vel=1049f/s, pen=14.7”, RD=0.54”, RW=147.5gr
auto windshield: vel=1042 f/s, pen=13.4”, RD=0.53”, RW=140.4gr
.40 S&W Corbon 135 gr Powerball from S&W 4006
BG: vel=1362 f/s, pen=11.6”, RD=0.65”, RW=131.4gr
4 layer denim: vel=1359 f/s, pen=12.1”, RD=0.65”, RW=131.9gr
auto windshield: vel=1365 f/s, pen=7.9”, RD=0.61”, RW=103.6gr
.40 S&W Fed 180 gr JHP HST (P40HST1) from S&W 4006
BG: vel=960 f/s, pen=12.6”, RD=0.65”, RW=181.1gr
4 layer denim: vel=961 f/s, pen=15.6”, RD=0.62, 181.3 gr
auto windshield: vel=904 f/s, pen=15.2”, RD=0.47”, RW=180.4gr
.45 ACP Corbon 165 gr +P Powerball from 1911
BG: vel=1230 f/s, pen=12.1”, RD=0.70”, RW=158.8gr
4 layer denim: vel=1267 f/s, pen=11.8”, RD=0.66”, RW=159.7gr
auto windshield: vel=1251 f/s, pen=5.5”, RD=0.73”, RW=143.5gr
.45 ACP Fed 230 gr +P JHP HST (P45HST1) from 1911
BG: vel=926 f/s, pen=12.6”, RD=0.74”, RW=231.8gr
4 layer denim: vel=915 f/s, pen=15.4”, RD=0.67, 231.1 gr
auto windshield: vel=918 f/s, pen=19.7”, RD=0.54”, RW=228.6gr