Ok, some late-breaking updates:
First, as I discussed earlier in the thread, I ran into a total of 3 failures to reset when firing multiple shots on targets at 2 successive IDPA matches; essentially I didn't let the trigger go far enough forward before pulling for a successive shot. Now a part of these failures are on me-I need to practice sufficiently to build up the necessary instinctive muscle memory for shot-to-shot transitions-but there's also the factor that removing the magazine safety disconnect plunger concurrently diminished the amount of mechanical kick-back to the trigger assisting in the reset process. While I went with the BH Spring Solutions stronger 2-coil trigger return spring, clearly there were potential reset issues manifesting themselves.
I had a detailed discussion on this with BH Spring Solution's Mark Allen. He revealed to me that when FN went to the cast frame for the High Power, the slot where the trigger return spring is seated was also modified, allowing for some wallow/surplus space for the TRS's seating. While not much of a factor so as long as the magazine disconnect plunger assembly remained in place, on it's removal things could be a bit problematic. BH Spring Solutions was aware of this, and while they don't necessarily recommend removing the MDA (magazine disconnect assembly), they're certainly aware that many High Power owners do so, so they embarked on a solution.
Essentially, as you can see in the comparative images, while the new (and my understanding is that it's still experimental/not in full production) 2 coil TRS is of the same material and tensility, the bend is modified to provide a more secure seating/resistance in cast-frame Hi Powers.
Current BH Spring Solutions 2-Coil Trigger Return Spring (OEM profile):
New BH Spring Solutions TRS Optimized For Cast-Frame High Powers:
My initial post-installation live-fire testing was short, but I'm very positive over this spring replacement; while trigger feel is not adversely affected (neither myself or my gunsmith, Chris at C.a.R. Firearms {the C.a.R. stands for Custom and Restoration} could not discern any difference whatsoever in trigger feel between the 2 TRS-that's a good thing), the reset was achieved without any issues or failures; I'll be wringing it out more thoroughly in a March IDPA match.
Mark Allen also wanted me to try out one of their proprietary walnut grips, which they market as HiPower Master's Grips HYBRID. They have an extensive variety of them, varying in wood quality, finish, and embellishments. Their profile and thinness has been carefully calculated for ideal ergonomics. I requested a middle-of-the-line example; I wanted one with checkering, and in a darker color to aesthetically compliment the black epoxy finish of my High Power. I mounted my set using a red computer fiber washer to anchor the grip screws to preclude backing out in use.
Here are some images of them installed:
On installation, their fit is superb on my frame-it would appear that these were designed from the onset for fit with the cast frame. The feel is very ergonomic, with flowing curves and excellent proportions and thicknesses. The thumb shelf is muted, but appears to be ergonomically effective; it'll be interesting to see how it works with live-fire and under stress in a match or training situation. The grain figuring is very nice on my mid-level priced set, retail priced at $74.95 (they range in prices from $69 to $169).
Obviously, I'm very interested to see how these grips compare with the BH Spring Solutions/RDIH wrap-around fingergrooved polymer grips (and especially with the grips after benefiting from their VCD stippling treatment). My initial thoughts are that the RDIH/VCD will better handle the torquing and recoil of the .40 cartridges, but we'll see empirically how things shape out.
Chris at C.a.R. did a couple of other things at my request; the hammer sides have been slightly beveled for a more user-friendly, less sharp shape-better particularly for IWB carry, and the tip of the trigger has been given a slightly radius to be a bit more comfortable; subtle improvements, but they make the High Power incrementally improved, particularly for EDC concealed carry and protracted use. The execution was effective, and tastefully and subtly done.
Chris/C.a.R. can be reached here:
I've used them for several years for work on my 1911s, Glock 21, Beretta 92D and the High Power; their prices and work times are reasonable, and, most importantly, their quality of work and willingness to work with the customer is exceptional.
One last item for discussion; when after my live-fire session I field-stripped the High power for cleaning and re-lubrication, I noticed that the BH Spring Solution/EK Firearms Dual Buffering Recoil Spring Guide's cap (used to secure the replaceable inner spring) had slightly unscrewed, and was backed out about 1/8" . As recommended by BH SS, after the initial spring selection and verification, I had used Blue 242 Locktite threadlocker, after cleaning with isopropyl alcohol the screw and receptor thread surfaces. Apparently either the vibrations from the .40 recoil forces had broken the threadlocker seal, or I had insufficiently cleaned the concerned areas, or applied insufficient threadlocker. I reapplied the Locktite, and we'll see how it holds up. Alternatively, I'll either remove, thoroughlyn cleaning and debriding any old residue threadlocker residue, reapply fresh threadlocker, or go the alternative locking solution, using plumber's tape to lock down the cap. There was still plenty of screw length left after the loosening, and the screw only would back out so far as described and then stop, but it was still in need of correction. We'll see how it holds up.
Best, Jon