been thinking about acuracy.

[Catfish]

The general rule of thumb for figuring gains in velosity when makeing cases larger, Ackley improveing ect., is that you get an increase in velosity that is 1/2 the percentage increase in volume. This is not 100%, good enough to work with. Useing this formual a 1% increase should give you a 1/2% increase in velosity, or about 20 fps. with a round fireing at 4,000 fps. I take about 100 fps. to gain an extra 5 yrds. in point blanck range which mean that we are talking about less than 1 yrd. max. point blank range increase from a gun this is already point blank at abt. 400 yrds. Unless your gun is shooting sub 1/2 moa to start with you`ll never be able to find the vairation due to a 1% vairation in powder charge.
What Rocky said!!!!!!!!!!!!!!!