Good News! If you have a Hornady die set, your salvation lies in the taper crimp die. If you don't, find someone nearby who does or buy just the that die.
After the results from the two stab crimps, I had postulated that perhaps the taper crimp, applied over the factory crimp might be the way to go. I was more right than i imagined I would be. I applied a .474 taper crimp over the factory crimp on five cartridges. Why .474 you ask? Remember from the dissection thread, the front half of the bullet is narrower than the rear half that actually seats inside the case? You need to lay on more crimp than you might normally do on a straight sided bullet to reach the narrower walls. As an added experiment, I crimped another 5 using the resizer die minus the decapper. That's not a new revelation, as I've tried that in the past. It applies a more gradual taper crimp than the actual taper crimp die. That allowed me to catch some of the wider part of the bullet as well. While it resulted in an even better SD, it did not do as well on accuracy as the regular taper crimp die.
Here's the results:
You'll have to reference my previous thread to compare groups, but here's the resultant groups in the bottom two sections of this target:
As you can see, not only are the velocities slightly higher than the factory crimp, but the velocities don't vary as much and the left group demonstrates considerable improvement in accuracy. The resizer die had about the same accuracy as the factory crimps though. Oh well, some times you have to go out on a limb to find a truffle and some times it doesn't pan out. Get those presses going. Maybe even lay on a little tighter than .474 for good measure. Be reasonable though. I had no excessive pressure indications.
Hoot
