My current EDC is a Dan Wesson Guardian in 38 Super. That means it's a 1911 Commander, with a bobtail frame. I.e. 4.25" barrel, and (in 38 Super or 9mm) 10+1 capacity (using common aftermarket mags - 9+1 with the factory mags). I've been carrying 1911s for almost 30 years. I also have a factory 9mm barrel setup for the Guardian, so I can switch back and forth. I always carry it setup for 38 Super, but I usually switch to the 9mm setup when I go to the range, just because of ammo at 30 cents per round, versus 45 cents per round (for 38 Super). It is bone stock.
In the last 6 weeks or so, I have shot 2 USPSA matches and 2 IDPA matches. What guns I used in each were:
USPSA: Canik in Carry Optic
IDPA: Commander 9mm in ESP, and 1911 CCO 45 in CDP
USPSA: Canik in Carry Optic, Commander 9mm in Single Stack
IDPA: Commander 9mm in ESP
Shooting that 1 USPSA match with 2 guns was great because it let me get a direct comparison between shooting my Canik (with optic) to shooting my 1911 Commander 9mm with iron sights.
Today, I want to the range and put about 100 rounds through my Commander with the 38 Super barrel in it, and then another 200 rounds through my Canik. I was running drills, with a shot timer, so I also got some good data today to add to my comparison.
The bottom line is: With a 1911 Commander and iron sights, I am about 2 tenths of a second quicker on time from buzzer to first shot (starting with gun holstered and hands in Surrender position). After numerous reps, it was pretty consistent. With the Commander (which I shot first), my average time (over 21 reps) to 1st shot was 1.21 seconds. With the Canik, my average time (over 10 reps of that particular drill) to 1st shot was 1.44 seconds. I have DAA rigs for both, with DAA PDR Pro-II holsters for both), so I think it was pretty apples-to-apples on that comparison.
On splits between shots on the same target, I'm about 1/10 quicker with the Canik. Since I was shooting the 1911 in 38 Super today, which is just a little more snappy than in 9mm, I'd expect to have slightly quicker splits with the 1911, when shooting 9mm. But only just slightly. Also, the Canik has almost 1/2 a pound of weight added to it. Stock Canik versus stock Commander in 9mm, I think I'd have slightly quicker splits with the Commander than with the Canik.
The USPSA match also revealed that I am consistently more accurate with the 1911 with iron sights. On every stage where I did not have any kind of mechanical issue I had almost identical times on the stage, but scored more points with the 1911. Out of 70+ shooters at the USPSA match, I think I was in the top 10-ish on number of points scored on the stages. I'm just really slow, so I still finished in the back half of the pack. Maybe even the last 1/4 of the pack.
After a decent amount of introspection and also a good consult with one of my best friends, who is a USPSA Open Master shooter, I think the main reason I do better with the 1911 is that it is quicker and easier for me to get a good, proper grip on the gun. When I drop my hand to grab it, my first contact is with the beavertail (which is quite prominent on a 1911) and my hand has a fraction of a second to feel that and let me orient it so that when I finally really contact the grip/frame, my hand is really in the right place immediately.
In contrast, the Canik does not have that high point that I touch/feel first and that lets me index my hand to grab it correctly immediately. I feel like I almost always touch the grip/frame and have to adjust my hand slightly before I can really grab it and draw.
I think the superior 1911 trigger may also be part of the reason I am more accurate with it, even though it is iron sights and a shorter barrel. If I slow fire the Canik, for accuracy, it shoots nice, tight groups.
Lastly, all the experts seem to talk about an adjustment period for people transitioning from iron sights to an optic. But, my personal feeling is that it takes longer than what most people seem to suggest. Like I said, I've been working on it since last June. I've put around 2000-ish rounds through my Canik with the optic on it. I have done a fair bit of dry fire practice with it at home, too. I think it is still taking me longer to get an initial sight picture with my green dot than it does with iron sights.
Anyway, just some thoughts or observations on different guns and speed, that might be relevant to competition shooters.
With IDPA rules allowing 1911s to compete head to head against guns like the Canik, in the same division (e.g. ESP, Carry Optic, and CCP), I think for IDPA shooters, a 1911 in 9mm is THE way to go - for ESP, CO, and CCP divisions. The only advantage a Canik would have is higher mag capacity, which IDPA doesn't allow you to use in those Divisions. Division limit is 10 rounds. I just measured and weighed my Commander, and I think it would actually even be legal in the IDPA CCP (Compact Carry Pistol) division!
I should add, for USPSA, where striker-fired guns like Caniks don't compete head to head with 1911s (except in Open and Limited), the Canik is still definitely the way to go, in my book. I shoot mine in USPSA Carry Optics and would shoot it with iron sights in Production, if I had a second Canik.