If it is that Gun Blog 45, get some new non-adjustable rear sights that aren’t such sharp bastards.

No can do. Those are BoMar lo-mount knockoffs and the slide is machined to fit. As the joke goes: “Once you go Bo-Mar, you’ll never go back. At least not without a lot of welding and filing and refinishing.”

If one wishes to use it for CCW duties, knocking the sharp edges off the rear sight blade with a fine stone and touching up the results with Aluma-Black should do the trick.

OK, then.

FWIW, my carry guns are zeroed at 20 yards based on: 25-30 yards is probably the longest handgun defensive shot I’d ever have to make and a 20 yard zero keeps 45 ACP point of impact within 1″ of that at 30. Closer than 20 and POI isn’t significantly different from that at 20.

Here’s something to try: if your range configuration permits it, zero at your chosen distance, then, with the same sight picture, fire groups both moving in 5 yards at a time and moving out 5 yards at a time. Moving in you won’t see much difference. What you’ll see moving out is both drop and lateral dispersal, and at some point it’ll become a pattern rather than a group. With my students I use 8.5″ X 11″ copy paper on a larger cardboard backer, and when (about) 10% of the shots are off the paper that’s 10 yards past their maximum effective range, so zero for half that. Totally arbitrary, but it seems to work.

Ummm. No.

You’re referring to the “Tueller Drill” as popularized by Cooper, Ayoob and others. It shows that most attackers armed with an impact weapon can cover 21 feet in about 1.5 seconds.

When used as a defense, the Tueller Drill illustrates that the interval available to recognize a threat, draw, fire and incapacitate may be very brief. A second-and-a-half may easily be “inside” the response time of a defender, depending on circumstance (e.g., drawing from under a coat or inside a handbag.)

There is no “magic number” that defines your danger zone. That’s the point of the Drill.

Most 1911 shooters I know sight in at either 15 or 25 and call it square.

Fine advice for a primarily defensive gun. I don’t think that’s the intent here, though.

The problem is, with a .45 ACP, to get an inch over and an inch under out to 50 yards, you’d have to sight it in at some odd distance – maybe 40 or 45 yards (just guessing). In that case, why not go all the way to 50? And if you go all the way out to 50, you’re now an 1inch and a half high at 25 yards, out of the upper “A” zone.

If you’re going to carry it and maybe compete with it sight it in for 15 yards and you’ll be right on at 25 yards too.

I expect that with the laser, you want to see magic holes appear on the dot. Sight the laser for your laser practice distance.

With a 25 yard zero, for your sights, your hits will be a couple inches low at 50 and 1-1/2 to 2 feet low at 100 yards.

(we are talking about the Gun Blogger 45, right?)