I've emailed Hogdgon's twice w/o a reply asking both about the compression and need to reduce max loads, which is another thing their site does not actually state. Some people claim it's what is necessary, and others have stated it is not. Some have stated that metallurgy is better now. I'm not sure about that, and, despite the manufacturers warnings are often a safety margin for themselves, it's best not to push something like that, especially when injury or death may be a result. But being that Ruger states I can load up my chambers full of 4F powder I am not concerned with 15% more powerful powder. I wouldn't do it with any other BP firearm.