Pulling bullets that are crimped with the factory crimp die is a pain. That's one reason I broke two impact pullers hammering on the concrete and spilling powder on the floor. I too bought an RCBS collet puller but no longer use a factory crimp die. Kicked myself for not buying one years sooner. It seems like the light .223 bullets take a lot of pounding to get the crimped brass out of the cannelure with Lee factory crimps. If I crimp it's a light roll crimp. Like mentioned it'll wear your arm out and break your impact puller removing many factory crimped rounds. I once did a lot of 300 Lee factory crimped pulls with the impact puller. I bought my Lee factory crimp die years ago when they were first introduced. It's been in a drawer for many years. A chore to impact pull factory crimped bullets.
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