Rafsob
I do my own pressure testing and set my own limits. From my own testing BH runs about 15% less pressure than 777 so when you load 120 gr of 777 and 135 gr of BH you get about the same pressure. I also know of some commercial companies that were test up to 150 gr of BH in guns with thoughts about publishing such loads for there guns. I never tell anybody to do what I do and one of the reasons for that is that all guns are not made of equal quality now and that some of the older ones should not have over 90 gr of any kind of powder shot in them. Every one has to be the judge of if what they do is safe or not and pay the consequences if its not. Also I was in the business at one time and have some equipment that most do not have access to. Lee