This does't make sense to me. I have yet to see .2gr make that huge of a pressure difference. I know its a steep waterfall curve with pressure after you lock up brass in the chamber, but I think .2gr is picking pepper out of fly crap if you not using this rifle for competition. I mean the .2gr pressure difference could be alot of things like a fouled barrel. I would try the same workup shooting the 45.7gr first, and then the 45.5gr.

In all my years I have never worked up a load with such fine granularity. Most hunting rifles and weather varible will not let you see the difference in groups. At most I will find out that I have great accuracy between 45 and 46gr and maybe next time I go, I will try 45.5gr and see the difference. If none out of 4 3shot groups, then I always go with the 46gr. But there is too many varibles in even that. A good dynamic load shouldn't matter so much as 45gr and 46gr. Especially with a 308win. A sensitive load maybe.