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Shoot a few patterns and you'll likely find 40 yards is pushing it. A coyote that catches a ball or two will likely go unrecovered.I just picked up a box of Federal Premium Heavyweight Coyote BB loads. The shot is HW15 which is quite denser than lead. HW tends to pattern tight.It's not cheap at $5.00 a pop but it's probably the best stuff on the market. Sold in boxes of 5 'cause noone would pay for a box of 10
Both will do the job. Like said see which one your gun likes and you'll want to test at all ranges expected. Good luck your in for a treat. Shotgun can be your best friend hunting coyotes in the thick stuff! And it's a blast to get them in close