I agree, even results from day to day with everything the exact same can change for a number of reasons. Notwithstanding all of the foregoing in this thread, I have never used a published load from any source where if I stuck with the start load levels in my first shots, I had anything close to "pressure signs". I have had some where I couldn't get to the published max before I started seeing pressure signs, but the only disappointment in using start loads in countless loads tested was under pressure, which is only time lost. I have a friend who has been loading for maybe 50 years, who always uses max loads, period. He has loaded for maybe a hundred of different calibers over that time and never broke a gun. I personally don't do that as I have found most times something less than max will actually work better, but I think the "safety" aspect is highly overstated. I believe like most things in life (maybe including SD gun use), people worry about the wrong things when it comes to reloading. In my opinion, kabooms don't happen from using "bad" load data in a published manual, or even starting at max charge in that published source (not recommending this, just saying it is the wrong thing to focus on). Just thought maybe starting Monday off with something a little controversial might be in order.