So what makes you think you gained a lot of velocity? You may not be shooting same point of impact because you changed barrel harmonics by adding a break. Plus your groups got smaller because you reduced recoil. Until you adjust zero and check your new results against your old drop charts you don't have any problems that I see. Plus budget for a chronograph they aren't expensive unless you're buying a Lab Radar, I use a Pro Chrono and Targus tripod and paid $110 total and it works very well.
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