Hello tranky, I agree with Errecinque... time ago, in a trial I need 32 degrees of injection, and I used the 25 ppms and 7 dpms... when I do these tests I don't go more than 8 degrees dpms (10 for me and' the maximum), however, you have to try and rely as much as possible, of your feelings since that you, like me, you are just a fan and do not have the right equipment! The 156 in question constrictor digesting quietly in the 25 degrees of advance, on another occasion, a 147 instead murava a lot (in both cases, the fumes acceptable)...