Are Parker Trojans just unadorned, no frills Parkers, or is there something significantly different about them. Graded Parkers seem to be held in such high esteem, whilst Trojan Parkers are not. Also, when did Parker standardize their chamber lengths? The one I just purchased has 2 9/16th chambers. I have plenty of 2 1/2 inch shells in lead and Bismuth, but would like to use Hevi Shot Classic Doubles at some point if deemed safe by those who know.