Good evening, Gentlemen. Sorry to take so long to get back to y'all. I had read a bunch of your answers late this afternoon, and they made excellent sense! The main reason being, I have never used cast bullets thaat I loaded, and in my short reloading career (less than two years) I have never had a need to flare my cases. Everything just fit... But yes, I got home and did NOT have a Lyman "M" die, nor even a Lee Universal Neck Expanding die. But what I DID have was the memory of reading someone say he had used something with a taper and a smack with his hand. So when I got home from work, I took all those cases and a brass plumb bob and a rubber mallet, just a light smack put the cutest little flare on each one and I loaded the remainder of my cast bullets with nary a single problem. Thank you very much, Gentlemen, for your time, your knowledge, your expertise, and above all, for helping a newb when you all probably had things you'd rather be doing. For what it's worth, the bullet in question was for a .45 Colt, a Lee #90359 (dual-cavity, C452-300-RF) mold. But, for the record, I also cast some 405 grain flat nosed bullets for my .45-70 Government, none of which had flared case mouths, either. Now they do. I will be investing in the Lyman "M" dies for both calibers directly. Like Mr. Spock says, it's only all logical and stuff!