I am all thumbs when it come to reloading. I'm the self-proclaimed worst reloader on the planet. Been reloading since day one for the P220 and there is nothing that I have made that it won't eat. The only advise that I have to offer is that the tolerances on these firearms is tight. Making headspace and case mouth dimensions critical. Common mistake with beginner, don't over flair the case mouth during expansion and make sure that you have the proper seating depth when inserting the bullet. If you do not have a headspace gauge, take the gun apart and use the barrel to check those first bullets you make. Make sure that they fit freely in the chamber.
Robert
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