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The Lee factory crimp die can be used without a a groove or cannelure. I have used it for hot loads in my .357 mag with no problems. The guy from Hawk bullets recomends it for his custom bullets too.
http://www.hawkbullets.com/faq.htm
2nd question on the page.
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Yep it will usually take more then one revolution in the cannalure tool to get a good grove.
BT
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I use a tapered crimp on mine that are without canalures all the time, and with full power 44 mags at that. It works just fine.
What ever crimp you use , if they dont jump crimp, they will be ok.