My 204 has always been finicky to load for. It shot so bad when I first got it that I was thinking of a new barrel. Someone here gave me a load with Bergers that worked pretty well, but the velocity wasn't there. I decided to give load development another whirl. Here is what a mere .1 grain difference did in this gun. (gun has always been very sensitive to changes in charge weight.)

Shot this awful five shot group at 100yds:

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Increased charge .1 grain and shot this 3-shot group:

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I was surprised when I walked up to the target to see that bughole, so I walked back to the bench, waited 15 minutes and shot two more into the same group.

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Looks like I finally found the sweet spot! I cannot explain why this gun is so sensitive to charge differences, but it is.