I wouldn't chance it, the difference between .223 Rem and 5.56 NATO is 20,000 psi of chamber pressure. With the 100 being a collector piece, I wouldn't take the risk of blowing the chamber or any other catastrophic failure. The NATO rounds have considerably more chamber pressure than the SAAMI rounds.
762 as a percent:762 x 100% = 76200%
70 percent of 762 = 533.4 70% of 762 = 70% * 762 = 70%/100% * 762 = 5334/10 = 533.4
800
The phone number of the Sheridan Historical Society is: 308-762-4678.
800
100
800
The phone number of the Alliance Public Library is: 308-762-1387.
It is: 417+345 = 762
152.4
762 381,2 127,3,2
1760 * 762 = 1,341,120