At any rate, the first hundred and fifty rounds went off without a hitch, and then came Federal 124gr +P HST. Recoil was snappy, with that distinct feeling of the slide bottoming out the recoil spring, and then stopping a fraction of an inch out of battery.
It did that a total of six times in a box of fifty rounds. I tried standard pressure 124gr HSTs the next day and managed to induce it four times in a box of fifty. It doesn't do it with mild-shooting range ammo.
My first diagnostic here would be to replace the recoil spring assembly, which with a Glock or 1911 or even a Sig or M&P is a twenty- or thirty-buck transaction with Brownells or Lone Wolf or whoever. But the P2000 series is almost stereotypically German in its complicated multi-part, multi-spring recoil reducing guide rod and spring parts package, which is $120-$140 and out of stock almost everywhere.
So the P2000SK test is called off before it really started, while I look into what the factory recommended maintenance interval is on the RSA.
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