I've done crimp tests before, but never a head to head Taper vs Factory crimp specifically for accuracy. I also left 5 rounds uncrimped to see if they still shoot much worse (like they did last time I tried this)

I set up the taper crimp on my single stage and I'm not sure if have it set deep enough. The round on the left also looks asymmetrically crimped for whatever reason:



Guys have asked here in the past where I set my FCD, and I finally got a pic. I turned the die down a few thowie because I think wear on the die was giving me less crimp than before.



We'll shoot these this weekend, and post results. My worry is that due to the hefty chamfer the Giraud trimmer leaves, the taper crimp might be too light. But I also don't want to go too aggressive. If the taper shoots the same as the NON-crimped, I'll redo the test with more taper.