Nope. See CMP Games Rule 4.4.4d -

4.4.4 Loading Procedures. . .
d)  Rapid-Fire, Manually Operated Military Rifles. After the command ON
THE FIRING LINE STAND…WITH BOLTS REMAINING OPEN…LOAD,
competitors must load five rounds  in the magazine and  leave the bolt
open  (do  not  chamber  a  round).  After  targets  rise  or  the  command
TARGETS  is given, competitors must get into position, close the bolt to
chamber  the  first  round,  fire  five  rounds,  then reload  five  rounds 
and complete the series within the time limit.