steel target hanging from chains

Mbous

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Does anyone know if it will be worth it for me to upgrade my target hangers from 5 grade carriage bolts to say grade 8 hex head bolts. This is was happened with in about 4 shots of a 308 at 100 yards. The carriage bolt had been running through the target but now is missing the head.

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I don't trust the grade markings on cheap import bolts, I suspect that a Fastenal or Wurth labeled "Grade 5" would hold up better than a cheap bolt marked as Grade8.

It looks like you hit the bolt to me. Would a grade 8 bolt hold up to a direct hit? I have no idea.
A higher grade (hardened) bolt may hold up a little longer against direct impact.

Look for legitimate, US made, grade 8 button heads:
 
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