I got a Lee FCD in a bunch of reloading stuff I bought. Since it wa in 30-06 and I have been working on a load for my Savage, I took a box of 20 and crimped half of them. Then I shot three 3 shot groups of each.
The best uncrimped group was worse than the worst crimped group. An average showed the crimp was good for around 0.20". Not much of a sample but good enough that now I crimp all match loads.
