Hello. As I understand it, there are two types of buffers for the BHP: the plastic shock buff cushion type and the spring-loaded mechanical type.
I've been using Buffer Technology's plastic type now for over a year in several different HPs. ALL of mine use them and have experienced exactly ZERO problems with them in terms of reliability.
I believe that they do prevent battering and possible cracks in either the slide or the frame, but also believe that many thousands of rounds would need to be fired before experiencing any such failures. Certainly, the hotter the load, the lower the number of rounds needed to cause problems.
The only "problem" I've heard folks mention is that:
1. Slide often won't lock back in the second notch with the thumb safety for field-stripping, and,
2. It's "hard" to get the slide back onto the frame with the buffer in place.
To overcome the first "problem", simply push the slide back while in a firing position, but unloaded, by putting the lower front of the slide against your gun bench or something similar and simply push it back til it's even with the slide's dust cover. Remove the slide stop pin. Not too hard in my view and certainly not worth giving up the battering protection.
The second "problem" is solved by making sure that everything's lined up and just pushing it on. A bit of elbow grease, but not much. End of problem.
I also recommend the use of a conventional 18.5lb recoil spring from Wolff. (Go to Wolff's site to see the differences between conventional and variable.)
Since I shoot nothing less than standard velocity loads and many, many warmer factory and handloaded rounds, my guns are set up to reduce battering as much as possible.
This system's worked for me for thousands upon thousands of rounds in 9mm.
The standard HP MkIII with no changes has done 5K Remington +P 115 gr JHPs with no problems according to an article in the "American Rifleman." You can find which issue and page by going to
www.fnhipower.com and looking under the "FAQ."
You may find the below-listed links of use:
www.buffertech.com
http://www.gunsprings.com/
Hopefully, this is of use.
Best.