"...overall length is 1.25..." 50 thou too long for one. OAL on a 230 is 1.200". A 230 is close enough to a 225.
"...6 grains of Unique..." That's a Max load for a 230. You work up to it or just pick it? You need to work up the load, not just jump on the Max load. Isn't dangerous in any way, but you don't have the best load for your pistol either.
Mind you, you're having an extraction issue, so it's not the load. Highly unlikely to be a case bulging issue either. If it was, it'd happen every time. Have a look at the extractor. Burrs and such. Not likely to cause a need to hammer the slide.
The bullet leave the barrel every time? I'm thinking squib load. Not enough powder or no powder and a bullet gets stuck in the barrel then pushed out(well blown out) by the next shot. Usually means there's a bulged barrel and said barrel needs replacing. Isn't likely in this case though as the pistol keeps working, but look for a dark ring in the barrel.
