I finally had a chance to fiddle with a friends Chrono this weekend. And while it had a low battery warning, my AR/1911 and his 1911 were all consistent.
I was all over the place with my Spartan's 9mm loads. On a whim, I pulled one after it was chambered and noticed slight impact damage on the front of the JHP. I am suspecting that I am getting setback.
Should I start tinkering with the gun or put more crimp on my loads?
Load is as follows:
Montana Gold 124gr JHP
4.4grn of WST
~1.1 OAL
Mixed Brass run through EGW U-Die (get a good coke bottle effect)
Crimp is basically removing any hint of belling, I'd have to measure
I was getting from 1300 fps to 1800 fps... you can guess which were probably contributing to some flattening primers. Brass looked safe still though and flat primers were just flat, no flowing.