Hello. I was able to do some informal tests comparing the "old technology" 158-gr. LSWCHP +P to Corbon's 110-gr. DPX +P as well as Speer's 135-gr. GDHP +P.
Accuracy testing was done at 10 yards. All firing was done with my usual "24/7 gun", a well-used S&W Model 642.
The worst group shot was with Remington's 158-gr. LSWCHP +P. The fact that it was the worst could also be because it was first! Frankly, all three loads grouped very well and I believe that at this range they were all probably capable of much, much tighter groups than I shot.
The best group of the day was fired with Speer's 135-gr. GDHP +P.
Average velocities were based on 10 shots fired 10' from the chronograph screens. Here are the results:
Corbon 110-gr. DPX +P: 1164 ft/sec
Speer 135-gr. GDHP +P: 921 ft/sec
Rem 158-gr. LSWCHP +P: 844 ft/sec
Fired into super-saturated newsprint which had soaked for 24 hours and been drained 30 minutes before shooting, the following penetration depths were recorded. Each is the average penetration based on 5 shots.
Corbon 110-gr. DPX +P: 8"
Speer 135-gr. GDHP +P: 7 1/2"
Remington 158-gr. LSWCHP +P: 8 1/2"
All expanded consistently and there was very little difference in penetration depths shot-to-shot with each load.
For those interested in a more detailed report, follow the link below:
http://www.hipowersandhandguns.com/38 Snub Ammo Test.htm