RE: why use 150 grains of powder?
I agree with bigcountry. This topic is very similar to shooting turkey loads and custom chokes. How one load and choke shoots out of one gun will be different than the next. Don't assume anything, take "your" gun to the gun range, set it up on a good bench with bags, and try shooting groups with different bullet and powder weights. Soon you will find the magic combonation that groups well out of "your" gun.<img src=icon_smile_wink.gif border=0 align=middle>
"Spring Season....the Best"!!!