Not judging you at all. Just not used to factory velocity being exceeded in real life. Most often they use a fixed chamber test barrel of a length longer, or at least the longest commonly seen. Their specs are usually over what is commonly found in actual use. sorta like the +P advertising hype used for rounds that have no +P SAAMI ratings.
Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!