"First let me explain my test criteria to determine a 100% reliable load. I use a dirty and dry gun. When I shoot I point the muzzle almost straight down so gravity is acting on the slide against recoil. Finally I try different griping techniques (normal high grip, low grip, slight limp wrist, medium limp wrist to full blown sissy wimp wrist ( say that five times fast).
A load must cycle 100% through my medium limp wrist testing, as I will accept some failures at full limp wrist. My theory is that I am not always guaranteed the chance to be able to make sure that I have the proper grip, and since I load bulk in production runs, I dont know how the rounds will be put to use.
When I first got my G42 I tried my p3at load of the xtreme 100 grain at .965 on top of 2.8 grains of Bullseye. It didn't meet my above testing specs, so I then began testing other loads. Keep in mind that this was a brand new gun that hasnt had it's first cleaning when I did this workup.
First up was Unique and I found a good load at 3.5 grains. I ran about 100 rounds to verify the load and then I went to pulling the ol press handle to load up the other bullets in the 500 pack. I lucked up and got a good deal on some fired 380 brass and I ordered 1,000 more of the xtremes. My problem was that I didn't have enough Unique left to load them, and well the powder situation is much like it is today. I began trying different powders that I had.
CFE powder was tested when I got my brass and bullets in. The online Hodgdon data lists 4.0 grains of CFE as a max charge using Hornady 100 grain FMJ. and a COL of .980. I have been using the xtreme bullet for some time and I use a col of .965 as my working col. Much longer and my p3at will choke. Its .15 difference in COL but the Hornady is a round nose and the xtreme is flat point, so I decided that my .965 COl would not get me in trouble by raising pressure with a deeper seated bullet, since the bullet should be shorter. I also decided that the 4.0 grain max Hodgdon listed would be my max charge. I believed that I may have a little higher pressure, but I had confidence that the locked breech of the G42 could handle loads loaded warmer.
Pressure tell tale signs do not show up until it is way too late on low pressure rounds such as the 380, so my workup ended to where I was comfortable shooting without a heavy welding glove for protection. I got to 3.9 weighed grains and this load was not 100% using my medium limp wrist grip. With a normal high grip it was the first one or two cycling rounds that failed to feed. It was more of a short stroke of the slide. If I lowered my grip by about 1/4 of a inch it was worse. I tried the same at 4.0 grains (my max) and it was a little more reliable. I did try a few just to see at 4.2 (ABOVE MAX) and they seemed fine, but I didnt load enough to really run through the paces.
Much like you I use a progessive press and I dont plan to weigh each charge. MY Hornady Powder measure will throw CFE right on with an occasional .1 grain variance. Keep in mind that this was with an almost brand new gun ( little over 100 rounds) and it has not had it's first cleaning at the time."
Great reply, thanks.
I've been using the X-treme 100 gr plated FP loaded to an OAL of .950", which is the same as Freedom Munitions reloads with that bullet. Fired in 4 different G42's, there have been no problems related to the length. No idea how that length would work in other guns, but it's probably ok in most guns or Freedom wouldn't use it.
My powder charge is 3.4 gr of WW231. That's above the max load that Winchester lists for a 100 gr bullet, but less than the Hornady max for 100 gr and less than the Speer starting load for 95 gr FMJ. I understand the effects of different components, but geez...
Anyway, my load averages 843 fps from a Glock 42. That produces the same "free recoil energy" in a G42 as the Speer 90 gr Gold Dot which averages 933 fps from my gun. Feels the same to my hand, too; which was my goal. I have not deliberately limp-wrist-tested this load since it's a practice-only load, but have fired something over a thousand of them through four G42's in "draw-and-shoot" practice where my grip is sometimes less than perfect, with no problems, so it's good enough for my purposes.
Unless someone else can report good results with CFE-P in .380, I'll have to take it off my list and just go with Power Pistol for both .380 and 9mm.