Accuracy
As usual, I tested the gun with ammo representing the three most popular bullet weights for the caliber. For a 115 grain, I went with the famously accurate Federal 9BP, a conventional cup-and-core jacketed hollowpoint with long, subtle jacket skives to aid expansion. This was the load handgun ace Tom Campbell used back in the day for accuracy-intensive matches like the Bianchi Cup in his 9mm Smith & Wesson. It lived up to expectation with the Gen5 G19, with all five shots in 2.15 inches. The best three of those formed a 1.05-inch cluster.
For a 124 grain, I went with Speer’s +P Gold Dot, which from NYPD to Las Vegas Metro has proven to be one of the most dynamic man-stoppers ever produced in 9mm Luger. The overall 5-shot group measured 3 inches on the nose. Four of those shots were in 1.70-inch center to center, and the best three, in 1.15.
The 147-grain subsonic load was the relatively new SIG training round, the only roundnose full metal jacket 147-grain 9mm I know of over the counter. Overall group went 4.35 inches, due largely to one errant shot. The other four were in 2.55 and the best three in exactly 2.00 inches.
This particular test gun came out of the box shooting high and left. It turned out that a 6 o’clock sight picture, with the front post level in the rear notch and balancing a 6-inch Birchwood Casey Shoot-N-C bull’s-eye on top, delivered the shots where intended for elevation. However, all three bullet weights shot 2-1/2 to 3 inches left.
No problem. Just a job for a sight-pushing tool. The optional AmeriGlo rear sight was easy to move in its dovetail, without ever feeling loose. As sighting-in progressed, I tested with a couple of different economy-priced 115-grain full metal jacket “ball” rounds. The American Eagle load from Federal, which I use a lot in matches and personal training, put all five shots in 3.30 inches and the best three was the best such cluster of the test: 9/10 inch. I then tried another cheap 9mm practice round, the 115-grain Remington-UMC. I didn’t have another bull’s-eye to stick on the IPSC silhouette I was using for a backer, so I just “went for the throat” and balanced the square head of the target atop the post-in-notch sight picture. The group was still a bit left, but center for elevation. It measured 2.25 inches for all five hits, and 0.95 for the best three.
Either I was getting better, or the gun was breaking in… But, seriously, it explains why I do those two group measurements. The “best three,” I’ve learned over decades, will about equal what all five would have done from a Ransom Rest assuming no “called flyers” and an experienced shooter on the gun. With five different loads the Gen5 GLOCK 19 had done very consistent “best threes” of 1.05, 1.15, 2.00, 0.90, and 0.95 inches. That’s an average of 1.21 inches—less than 1-1/4 inches at 25 yards hand held from a Matrix rest on a concrete table.
Is the company justified in calling that a “Marksman” barrel? In a moderately-priced polymer compact 9mm, I would have to say, “Yes.”
Is it an improvement over previous models? Well, I looked up a test done on the same range with the same protocols a decade or so ago with a G34. This is the pistol Robert Vogel has used to become the indomitable World Champion of the International Defensive Pistol Association and is famous for its accuracy. In the test, the G34 with 5.3-inch barrel averaged 1.10 inches for “best three” measurements—only about a 1/10-inch tighter than the 4-inch barrel Gen5 G19 carry gun. Yes, I’d say Gen5 is an improvement so far.
The Gen5 barrel is crowned and has what appears to be conventional land-and-groove rifling, described by the manufacturer as “GLOCK-improved polygonal rifling.” Does this mean the firm will approve it for use with all-lead bullets? I asked, and the answer was “No.”