I’m a little confused by your post. Are you saying that a clear ballistic shield WOULD stop a .30-06, .30-30, or 7.62x54R round? How about 5.7, .40, or .45 handgun rounds?
I would imagine any round larger than .308 FMJ would shatter a clear ballistic shield or at least leave the holder with a broken arm and a bad headache.
Most handgun rounds are blunt and spread their force in an area 20 times larger. Rifle and 5.7 are pointing little bastards and should penetrate at least a shield. The 5.7 was designed to penetrate armor and did quite a job a Ft. Hood.