where the 125 HP is a 357 rather than a 9MM ... right?
look at the cavities.
in order to expand at the lower velocities of the 9MM the cavity is going to be a little wider and a little deeper than what is needed in a 357 HP at magnum velocities. that material taken out of the nose had to be put somewhere. That makes a longer bullet.
I take it you are trying to sub in this 124 over a load you have developed for the 125 ... I strongly suggest you drop back to the minimum charge and start over.
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it just needs more voltage
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