On 11/11 got my 1911a1 Rock Island I ordered a month ago, full size 9m/m. Went to the range yesterday and worked it hard. After about 30 rds of Fed. 115 gr. ball had one failure to lock back with empty mag. Went on to shoot 3 different h.p. bullets both factory and hand loads with no problems. The Fed ammo shot about 2 in. high at 25 yds. and all other ammo shot to p.o.a. The gun ate everything I fed it, different cast bullets of 115, 124 and 147 grs. Thus far I believe this is a good pistol and maybe a good carry gun but I have to shoot it more.