Go 14ply tires or drive at night if possible.
If you must drive during the day with 10ply and 100⁰+ temps, I definitely wouldn't start out at max psi.. Most of the guys I know that don't run 14ply have one of these and they get used frequently.
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My brother keeps one of those in his trucks when he hauls cattle from his place in western Oklahoma to his place in Seminole/Hughes county.