Personally, I'm not losing primer pockets fast enough to worry about it, but if you are and it his works, rock on.
If it works well enough then eventually Lee will make a $15 tool that works in a press for this. Hornady will make the same thing but it costs $40 and is a 50 thousanths smaller than spec. AMP will release a $2,500 hydraulic press with a force gauge that produces a graph so we can see the exact point at which at which the brass yields to reform the cup. Novels will be written on the internet about how as long as you use a 16oz hammer and let gravity control the force via a 6" drop (calibrated for variations in your local gravitational field of course) that you'll size the pocket perfectly. People who shoot Weatherby's will insist it has to be a ball peen hammer because of the roundness of the peen. The Europeans will tell us stupid Yanks that they've been doing since the 1647 but it only works if you use the metric system. The Aussies are asleep right now, and besides they're probably too busy fighting off all the poisonous snakes to worry about primer pockets.