I've used a sidewinder on 2 deer when shooting 65#& 70#ke. Both passthru's. Not sure if 59.5 would be too little or not, but the steelheads sure have a strong following and would do you well I'd think.

IMHO the sidewinders are a 1 hit wonder. They do a great job, but all 3 I flung were junk after the kill. One was a miss[8D]and it went into mud/dirt hit a root and was heavily bent. The two that went through deer were 1 bent, 2 blades boogered up real bad & tip had a ragged edge.

The steelhead has a steel ferrule, so you know it should always be good to go.