The idea of "Muscle Memory" holds up.
I took the H&K out to the trash heap this evening, in the interests of perforating tin and styrofoam. I wasn't terribly impressed with my marksmanship at first--the first twenty rounds went left and low of my mark, but once I got past flinching, and got into my focus, I hit my targets (paper plates and the top of a soup can, from 15-20 yards) a good 80% of the time for the remaining 30 rounds I had brought with me.
Not impressive, but satisfactory, and certainly encouraging for someone who hasn't squeezed off rounds since this past March or April.
I experimented with a new grip I had seen on one of the other gun blogs. Here's my approximation of it:
It's OK, not that much of a change from the grip I normally use:
While I feel a little more in control of the gun with the first grip, I'll have to shoot with it some more to see if it really offers any better benefits for me than the one I have been using for about 10 years. I'm comfortable with it, am accurate with it, and I'm pretty sure that in a stress situation, this is the grip I'd naturally fall into.
I saved most of my brass from the plinking spree. Once I get some more cash, I'll have to look into reloading components for .45 ACP. If anyone has any recipes they like for self-defense loads, I'll be happy to look at them.
Normally, I'd just buy a couple of boxes of Cor-Bon, but given the rising cost of ammunition, it may behoove me to roll my own for this caliber.