You need to remove some of the variables and state some of your goals.
Is this to hit gongs at distance, target or hunting - the need will shape the direction you may want to take with the load you're after.
Also you state a stiff breeze - most likely not consistent select a day that is almost dead still and if you can the morning or late afternoon (if for hunting use this would aproximate animals being around).
What contour barrel being fired from standard 700 contour, varmint like a heavy 5R etc - will determine any heat walk to be expected with hot loads or lots of rounds with little time between for barrel to cool.
Do you have a supressor? if yes removes a chance you developed a pull or flinch over the time shooting for the day. if not did you notice starting to flinch or better have someone watch you for this.
The key to this stage of selecting or narrowing a load is about consistency and maximising the situation that you did exactly the same for each shot or calling it when you deviated.
You've made a good start - don't be discouraged... there's lot to eliminate to uncover the real learning's
PS. don't forget your sweet spot for hunting and target might be a lot more south of the Max loadings in the guide than you think. mines 63.5 of IMR 7828 cloverleaf... Just saying.
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