Im sure H&K tests a variety of bullet weights. Bench rest your shots on your accuracy tests from a rest. If your sights are off, drift them into alignment for windage - different weights may print higher or lower - for obvious reason.
From my understanding, all new HK are fired to test impact gross accuracy of the fixed sights on the handguns befor releasing the product. This requires a "standard round". Afer 33 years of shhoting , I have learned some of the basics and +.
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