I'm trying to mount a 39" TV that I have previously mounted (with no issues) into typical wooden studs with an arm mount. The mount uses two vertically oriented 5/16" bolts. After stopping by my local tool rental, I picked up a hammer drill and some lag shields, for which they recommended a 1/2" masonry bit. The bit was obviously too large as I cannot get the lag shield to stay in place.
So now I have a few 5" long 5/16" bolts, 5/16" lag shields, and a brick wall with somewhere between 2.25" and 2.5" of drywall covering it.
Provided that I go get the right (smaller) masonry bit, should the wall support my TV or am I fighting a losing battle? Should I buy even longer 5/16" bolts?