I do not believe it is that simple. 231 is 30% nitro, where Titegroup is 40. But Sport Pistol has only 10% nitro content and also makes more velocity at a given pressure than 231. I have been unable to establish the nitro content of AA#2, and I have looked at length. I know from our previous discussions you don't like Titegroup, but as I've researched double-base powders I've found that 40% nitro content is the overwhelming number. Bullseye, Unique and BE86 are all 40% powders. Whatever one may dislike about Titegroup can't really be laid at the feet of its nitro content - as that is shared with most popular double-base powders. The 'powder profiles' from Handloader magazine seems to be the only way to get this figure. I may break down and buy their book of them just to be able to establish the nitro content of the powders we all use. But mark my word - most are 40%.