Getting back to the hollow point shootout ......
The HP'd uncoated bullet shot very well so I had high hopes for the coated version. This was quenched after coating so the BHN was about 25.
Accuracy was not so great, mainly due to a single flier. If you disregard the flier then the average was 3.4", about the same as the solid nose control load, but I don't like to disregard fliers without a darned good reason.
Velocity was 1408 fps today vs. 1369 fps when I shot the uncoated HP. Past experience with this bullet tells me that accuracy deteriorates above 1400 fps and can cause fliers. What caused the velocity to increase?
-- I had been using a 12+ year old batch of CCI 550 primers, but ran out of those and switched to a fresh batch about a week ago.
-- also about a week ago, something fell off a shelf, landed on my RCBS 10-10 powder scale, and messed up its calibration, so I gave it a tune-up and recalibrated it and compared it to test weights and to two other scales. I trust it today, but can't verify that it was calibrated correctly prior to the recent tune-up.
-- the temperature of the shooting shack is controlled, and I'm still using the same jug of powder, so those things are constant.
I'm guessing either the fresh lot of CCI 550's is hotter than the old lot, or else the 10-10's calibration had drifted prior to its recent tune-up. Either way, the 15.6 gr. load is now faster than it used to be. I decided that henceforth I will tweak the powder charge to maintain about 1370 fps, which seems to be the sweet spot.
In the meantime I can't draw any conclusions about the HP with this particular bullet. The uncoated HP was slightly more accurate while today's coated HP was slightly less accurate, but the differences were small and it takes a lot of shooting to "prove" anything.