I own an AR , and now I am considering buying a bolt gun in 223, my question is can I fire 5.56 ammo in this rifle without any concerns ?
for me 223 rem is a low caliber for a bolt action rifle
I do not know what all the big fuss is about, unless there are some really low grade bolt rifles out there I am not aware of. Any modern Bolt action firearm is strong enough for 62,000+ psi working pressures. Almost all .223 bolt actions are designed from actions that accomodate larger calibers, so the metal in the chamber chamber area is THICKER than it is with .473" bases cartridges (ala .308), certainly thicker than on an AR. That thick barrel screws into a chrome molly receiver, unlike an AR that attaches to an aluminum upper that you can cut with an axe. The Bolt lugs on a conventional Bolt action rifle have a large engagement area. The contact face area of the two lugs on a Winchester, Remington or Savage bolt action is much more than the actual contact area of those little lug faces where an AR bolt engages the barrel extension. I cannot understand why people think a Bolt action is not as sturdy as the lightweight AR chassis.
Also do not forget that a Bolt action simply must be designed to handle more pounds of force because a 62,000 psi medium base cartridge has more square inches due to size produces a lot more pounds of force than the smaller .223 just because there is far less surface area.
Remember the example that your thumb seals off a pin hole in a hose, but your thumb is not strong enough to seal the end of the hose even though the city water pressure is the same? Same idea here.
The only place you will get in trouble is with antique rifles, whose metalurgy is questtionable, and the .223 was not developed that long ago. Your not going to blow up a bolt gun with any round that will shoot in the AR.