JB27 -
You have 2 completely different and distinct adjustments going on there.
• The
crimp diameter determines whether the cartridge case has had enough flair removed to allow the case to enter the chamber all the way. The Luger cartridge is tapered. That should tell you that the Luger chamber is also tapered. "Tapered" means it gets smaller and smaller as you go in toward the rifling. So the taper crimp ensures that all the flair is gone so that full case seating can occur.
Capiche ?
Once you remove enough flair for the case for it to work in your barrel, then
STOP !! More is
NOT better. If you have 3 different 9mm guns, then a case gauge might help, but if you only have one, then the barrel from that 1 gun is a far, far better gauge. Save your money, honey.
•
Feeding is related to the ramp shape, bullet nose shape, mag lips, OAL and some other variables. The only one you have control over is OAL. The Barry 115, 124, 130, 135, & 147gr RN will all load in my tight-chambered CZ just fine out to the max of 1.169", so your Glock is going to laugh at longer lengths. I usually run into feeding issues when the 9mm cartridge gets down to the 1.050" area, so I believe your issue is that
your rounds are too short, not too long.
IMHO you need to make up 5 rounds each at 1.160". 1.150", 1.140", 1.130" & 1.120". I think your feeding issues will completely disappear between 1.150" and 1.120".
Hodgdon's website suggest 4.3 to 4.8 gr for 115gr LRN. I picked a 'spot in the middle' at 4.2 gr.
• Your load is way
underpowered because 4.2gr does
not fall between 4.3 and 4.8gr. I'm sorry to have to tell you this, but you cannot fail 3rd Grade math and be a safe reloader.
Start loading at 4.4gr until you find your perfect OAL, then do some load testing for accuracy with your new OAL. That should cure everything.
Hope this helps!