Re: strange load question
It really will depend on your rifle as far as if accuracy will be better or worse or the same. The same powder with a lighter bullet will increase the velocity but not as much as most think. Get out and try it!
If you HAVE to have the same amount of powder and want much more velocity, you WILL have to go with a faster powder. Otherwise you will be stuck with a little bit more speed.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.