I took an introduction to IPSC course last Friday night and the instructor told us to make 50 dummy rounds (no primer or powder) and dump them in a box along with 50 live rounds, mix them up and load our magazines and practice practice practice. About 1/2 way through the excercise my groups went from 8" down to 3" using my 230 gr .45 ACP over 4.9gr W231.
This along with a proper grip helped me the most.
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