LC M193 is the "Gold Standard" that all other Ammo is compared with. There are only four kinds that I would be willing to bet the farm on. LC M193, Fed XM 193 (same ammo, LC is surplus. XM is identical cartridge for sale to civilians).
IMI M193, Win Q3131A (same ammo IMI is Israeli Military Industries, same as issued to Israeli Security Forces. Win Q3131A is manufactured by IMI for Winchester, identical to IMI M193. Fragmentation for all practical purposed is the same for all ammo. You can't go wrong with any of them.
I've fired about 3000 rnds of IMI M193 in both my AR-15 and Robinson Armament M-96 Carbine. Never any problems of any kind in either gun.
Botach Tactical has IMI M193 on sale now for $189 for 1200 rnds with free shipping. That works out to $157.50 per 1000 rnds delivered to you door. The only place where you are going to find LC M193 at that price is maybe at a gun show. I just bought 2400 rnds of IMI from Botach and I'm very pleased with it.