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The manufacturer only states the falling velocities for the SK Pistol Match Special .22 Long Rifle ammunition. "The 40-grain bullet shot out of a 5.9-inch barrel will have a muzzle velocity of 955 feet-per-second and 81 foot-pounds of energy. Out of a 4.7-inch barrel, the numbers are still strong with 938 fps and 879 ft-lbs." I recommend contacting the manufacturer to see if they have any other velocity testing done with the barrel length you are looking for.
This is something you'll need to contact OpticsPlanet customer service about. https://www.opticsplanet.com/help-center/
This ammunition is 40 grain, if your bolt has been reworked in some way you may want to use 36 or lower grain ammunition.
https://www.opticsplanet.com/s/22-lr-ammo
Each box of SK Pistol Match Special .22 Long Rifle you purchase may be from a different lot, and you can buy multiple boxes.
In some of Anchutz 54 match rifles this ammo is better than any other brands of match ammo, no matter the price. The accuracy from common rifles exceeds all comercial ammo in my experience. This expercience comes from decades of benchrest competition.