Went to test some 125g, 9mm HAP's yesterday and one of my loads was Titegroup at 2.9 and 3.1 at 1.080 COL. The data I used came from Hodgdon which list's this exact bullet in a load range of 2.8 to 3.2 at the test COL of 1.069.

Shot the first round of 5 with the 2.9 load, with a G19, and the casings landed about a foot from he gun on the bench. Went to the 3.1 load and was better but not near the ejection distance as a typical factory or other hand loads. Shot the second round of 2.9g and had one that didn't even cycle the slide. Of course VERY soft shooters and actually pretty accurate (only shooting at 10 yards though) but too light for reliable function.

Question is would the extra COL of + .011 make that much difference in the pressure of the load? I am going to try Titegroup again with a bit more powder. The 3.1 wasn't bad but I feel I could go up to 3.3 without any issues or should I shorten the COL to their 1.069.

In my 9mm 3.5";
a .01" can mean a change of .1-.2 grs depending on the burn rate and bullet weight.

a 124 plated with Bullseye from 1.14 to 1.16 with the same charge
has a difference of 46fps.
Green Dot same OAL had a difference of 63fps.

I don't shoot bullets less than 1.12" in my 9mm's, even a 110gr jacketed bullet.

Your recoil spring may also be playing a part in your ejections.
Good shooting.

Most of my FMJ and Plated loads are 1.140 to 1.150 but the Hornady XTP's and HAP's seem to call for shorter COL. I measured some factory XTP's and 115g=1.079 and 124g were 1.060 so that's where I come up with the shorter COL.

I am just using the stock recoil spring in my G19 and have never had an issue until this load. Typically the cases are thrown pretty consistent 5 or 6 feet toward the right shoulder. Hodgdon's load just seems light. I didn't have any of the same issues with other loads using CFE and BE-86.

I think I'll leave the COL alone and bump up the charge .1-.2 and try a few. Would also like to try some in my 3913.

One thing I did notice is the Hornady 10th doesn't list Titegroup in their data for 9mm 124 XTP's or 125 HAP's in 38 super. Maybe not a good choice for that bullet?

I did try a 115gr plated at a "Short" OAL of 1.10" just one time.
Red Dot, Green and Unique were to bulky to get any speed.

Bullseye was a little better but the Hodgdon and Win ball powders
filled the case better and gave the top fps, if needed.

W231 was more accurate than CFE in my 3.5" but HS-6 was 100fps faster.