they never made a 45 long colt. It's just a 45 colt. My rcbs dies for the 45 colt are group B #19112 and my rcbs 45 auto group B dies are # 18915. Both my die sets are 3 die sets. Now with that said the dies you have should have a stamp on them that say what they are for. I just look at the web site rcbs, you have 45 colt steel dies, not the carbide dies with means you while have to use case lube with the full length resizing die.
Last edited by ruger357w; 04-15-2012 at 12:12 PM.