Conditions haven't been windy here but I expect it will be blowin' pretty hard during my antelope hunt in WY. Marlin, would it be correct to estimate 10 inches of drift at 300 yds? (5 x 3) - 5?

I bought a few other rounds to try out, leaning towards the 150's which my rifle seems to like:

Federal Sierra GameKing SPBT, 165 gr
Federal Sierra GameKing SPBT, 150 gr
Hornady Superformance SST, 150 gr
Hornady Superformance GMX, 150 gr

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Eric