Good question....I just bought a Glock 19 for my wife and three boxes of practice ammunition...Federal, Winchester and the cheapest Remington HP's I could find. I was trying three brands to see which this new pistol preferred and looking for the cheapest ammunition I could find. Normally, I shoot nothing but my own handloads, but she and I are signed up for one of Front Sight's Defensive Handgun Courses, later this spring and they specify only factory ammunition can be used. It's my 2nd trip out there...they run a good range, and the training is 2nd to none...talked my buddy and his wife into going with us as well...My wife'll complete the training with the Glock and I wanted to find a good load that would give her some confidence in the gun.
At any rate, the local Walmart had 9mm's in 100 round bulk packs as follows:
Federal 115 gr FMJ's at $19.97 per hundred count value pack
Winchester 115 gr FMJ at $22.97 per hundred count value pack
Remington/UMC Green box 115 gr JHP at $27.97 per hundred count
At 7 yds, I got the following groups from a two-handed Weaver Stance:
Federal .... 5/8" for 7 shots, average of two groups
Winchester.... 1-1/4" for 7 shots, average of two groups
Remington.... 1-1/2" for 7 shots, average of two groups
Certainly not a sandbag test of what the gun is capable of...but it does tell me that Federal (and for once, the cheapest) is the best so far. I ran the brass through my Dillon 550B with my standard load of Win 231, and Winchester's 115 gr, bulk JHP (bought ten years ago for a nickle a piece!!) and got groups of about 3/4" for the given 7 shots.
Moving back to the ten yard line, the relative standings remained the same, tho groups opened a little...I was firing in steady moderate rain and didn't spend a lot of time on it. All three were well under two inches, the Federal running an inch and a quarter. I haven't tried these accurate Federals in my other three 9mm's (a Colt 1911 gov't, a Combat Commander, and a Beretta 92), but I'd be surprised if they didn't like them as well.
I've not chrono'd any of these factory offerings, but did notice that the Federals ejected into a nice neat pile a foot and a half to my right rear, the Winchesters, a bit farther out, and the Remingtons about six feet out and rear....without chrono'ing them, I'd say the Federals were a little slower than the other two, but still cycled the action just fine...no FTF's or ejection problems.
One last note, Federal, in my experience lately has been doing a sterling job on their quality control with regards to pistol ammunition. Six months ago, I took delivery on a new Ruger SR1911, and again as in the case of this most recent Glock acquisition, their FMJ offering was the best grouping factory ammunition tested. It was .45 ACP obviously, and 4 boxes of it mirrored the results I just had in 9mm. Too, it surprised me to find that they'd loaded it with small pistol primers, the .45 that is...had I noticed that in the store, I'd not have bought them, just to avoid the hassle of sorting my .45 ACP brass for reloading...as it turned out, the accuracy was superb from them, and I keep them separate from my large primer'd .45s without much trouble.
HTH's, Rodfac....