Hi njl, It's been a while. I never did get around to reloading (actually took the loader back). Well, I have a renewed interest in it and will be going down the reloading path real soon. I will stick to the original plan (recipe). Do you still load approximately the combo below?
Universal Clays 4.6
Precision Delta 124
That's hotter than I load. I load 4.3-4.4gr Universal Clays with either PD 124gr FMJ or MG 124gr CMJ, and it does around 1050fps from my G17. I did load some hotter ones in my first test batches.
These were all with PD 124gr FMJ to an OAL of about 1.156"
The latter two grain weights were the avg of 10 powder charges.
124gr at 1050fps is 130PF...I haven't seen any reason to load hotter than that. It's a little weaker PF than 115gr Blazer (136PF), which is what I used to shoot most, but it's noticeably less recoil.
I've also shot this load (the 4.3-4.4) in my 26, 19, and 34...but mostly through the 17. I haven't had any functioning issues in any of them.