After getting the loading bench set up after a home move and a short break from reloading, I threw two loads of 5.5 unique in WCC cases and a 230 LRN to try out in the 1911 .45 ACP My first round had a very snappy recoil, so I shot a factory round and confirmed that the hand loaded round was hot. I searched for the case with no avail. My factory case was sitting where I expected it. A further search still was fruitless. I fired my second handload and again had excessive recoil and torque. Still no case to be found. I went back to the bench, double checked everything before loading any more. What I found was I errantly set my scale at the first mark, thinking it was 5 gr. A quick double check of this scale revealed that the first mark is 10 grains. What I had was a 10.5 unique, not a 5.5. No apparent damage, stretch, cracks, bulges or other problems with the barrel frame and adjoining parts. This was more than a proof test, but I am lucky that everything held to gether with such a hot load. I credit this to 1) unique, 2) Lead cast Round Nose and 3) a .451 on the bullet. I have never had this problem before, but want to ensure it won't happen again. (I'll count the intervals and ensure the scale). A Lucky day for me and the Kimber.