I'm loading 50 grain Speer TNT's into .222. All cases are trimmed to within 0.001 and yet my rcbs competition die (the one with the micrometer on it) is producing COAL which varies by up to 0.010 on about 1/3 of the completed round. Any ideas? It's a pain to load them up then have to use a kinetic bullet puller to get the bullet out and reseat to correct coal. Thanks.