Yesterday I was happily priming 40 new .223 Lapua brass cases with Federal Match primers by hand. Just as the last one was done I came to realize I forgot to size the brass. Unwilling to deprime 40 cases I decided to go ahead and load then with a modest dose of H322 and 52 gr SMK. After case gauging all the rounds I headed to the range expecting poor results, and what happened took me by surprise, these new unsized cases did not affect accuracy. All five shot groups were less than .8 inches and the best measured 0.335! Can anybody provide observations or opinions??? I wouldn't necessarily do this again but it appeared to work out okay this time.