I am in the process of trying to find the best pellet for my Daystate .22 MVT. Luckily, I have access to an indoor 50 yard range, so no wind. I am asking for some inputs on what the best method may be for finding the best two or three pellets out of the 36+ various types I gathered 
Finished with around 20 pellet types but my biggest concern is velocity vs flight stability. A really bad pellet at 820fps may be an outstanding one at 960fps. Is there a "smart" way to sort through all these pellets and various velocities without spending a life time? Don't get me wrong, I love the process, but would hate to leave out a potential "tack driver" pellet because the JSB and H&Ns already rule Would I need to just go trough each and every pellet type with various velocity settings (820fps, 880fps, 920fps, 9660fp) and various head sizes?
What I really would like to find out how accurate this rifle really is. But I know this often depends on velocity, pellet shape, and rifle twist (and the shooter). Started with a cleaned and primed (5 shots through it) barrel. Shot 10-shot groups for each pellet regardless how bad they grouped from the beginning. Some things of note:
Pellet spiraling: Unfortunately, I do not have my slow-mo iPhone cam set up yet, I need to make my own scope adapter first. So cannot tell how the pellets fly and if they spiral or not. But I noticed that some pellets punched almost a prefect round hole (JSB Predator), while some tore a large hole (the size of two pellet heads) as if the pellet landed sideways or tumbled in flight before hitting the target.
Pellet velocity: I tried randomly various pellets at 50 yards starting with the usual well-performing suspects such as JSB, AA, H&N. Was able to maintain the same velocity when changing from one pellet weight class to another (i.e. 21gr to 18.1gr to 15.74gr) because the MVT is able to automatically re-adjust velocity after a few shots. I tried a range of velocities at 820fps, 880fps, 920fps and 960fps, except for those pellets that had a 2 inch or more grouping from the very beginning.
Pellet size: I tried various sizes, such as 5.50, 5.51, 5.52, 5.53, 5.54. 5.55, most of these were H&N Baracudas and FT.
Pellet head shape: a variety of (mostly) domed, couple wadcutters, couple hollow points, some pointed.
Barrel twist: can't control that, but must play role in velocity vs flight stability.
Results so far: The best groups so far were 0.5inch 10-shot groups with a couple of flyers. But only one out of three 10-shot groups with the same pellet was 0.5inch the other two 10-shot groups opened up to 1 inch. Most accurate were the H&N 5.51mm Baracuda Match heavy 21.1gr, the 5.50mm head size in the same pellet very close. Similarly accurate, but not always consistent were the JSB 18.1gr and the 15.9gr, the AA's Diabolo Field 16gr ; Napier 15.6gr; and the Beeman Kodiak 21gr. As the head size increased towards 5.55mm things got progressively worse. So at least I know that my Daystate barrel is 5.50-5.51mm which confirms what I read from others too. Also, it seems that a velocity of between 820fps and 950fps is a good range to test. But I read that JSBs 18.1gr are best at around 905fps, but not more than 930fps and not less than 880fps. Similar for the Baracudas. The JSBs seemed accurate but with "sideways?" punch marks at 820fps, while still accurate and nice round holes at 960fps but with more fliers. The only pellet that left a perfectly round hole on the target at all velocities was the JSB Predator 16.2gr, due to it's pellet head shape, and also because of its straight flight. I know that certain type pellet heads (hollow point, wadcutter, etc.) leave nice round holes normally, but if they tumble in flight they can leave a sideways mark too,
Question: Without a slow-mo scope cam how can I tell if the pellet is tumbling in flight? Can I tell it from the punch mark it left on the target paper? Are there any "smart" shortcuts or "best practices" in the process of finding the best pellet that would make sure that a potential "gem" pellet does not slip through? I cannot possibly test every pellet for all the velocity ranges! I believe that a goal of finding a pellet that groups three consecutive 10-shot groups at 0.5 inch at 50 yards is not unreasonable for a Daystate Airwolf .22 MVT (unless the shooter sucks)
Thank you for any input, experience!
Edit: before the next shooting I will replace the old Tasco Custom Shop 12-60x56mm scope with a brand new Mueller SF 8-32 as they supposed to hold zero better. I am getting some strange looks at the range anyways about that huge scope on a "bb-gun"
Finished with around 20 pellet types but my biggest concern is velocity vs flight stability. A really bad pellet at 820fps may be an outstanding one at 960fps. Is there a "smart" way to sort through all these pellets and various velocities without spending a life time? Don't get me wrong, I love the process, but would hate to leave out a potential "tack driver" pellet because the JSB and H&Ns already rule Would I need to just go trough each and every pellet type with various velocity settings (820fps, 880fps, 920fps, 9660fp) and various head sizes? What I really would like to find out how accurate this rifle really is. But I know this often depends on velocity, pellet shape, and rifle twist (and the shooter). Started with a cleaned and primed (5 shots through it) barrel. Shot 10-shot groups for each pellet regardless how bad they grouped from the beginning. Some things of note:
Pellet spiraling: Unfortunately, I do not have my slow-mo iPhone cam set up yet, I need to make my own scope adapter first. So cannot tell how the pellets fly and if they spiral or not. But I noticed that some pellets punched almost a prefect round hole (JSB Predator), while some tore a large hole (the size of two pellet heads) as if the pellet landed sideways or tumbled in flight before hitting the target.
Pellet velocity: I tried randomly various pellets at 50 yards starting with the usual well-performing suspects such as JSB, AA, H&N. Was able to maintain the same velocity when changing from one pellet weight class to another (i.e. 21gr to 18.1gr to 15.74gr) because the MVT is able to automatically re-adjust velocity after a few shots. I tried a range of velocities at 820fps, 880fps, 920fps and 960fps, except for those pellets that had a 2 inch or more grouping from the very beginning.
Pellet size: I tried various sizes, such as 5.50, 5.51, 5.52, 5.53, 5.54. 5.55, most of these were H&N Baracudas and FT.
Pellet head shape: a variety of (mostly) domed, couple wadcutters, couple hollow points, some pointed.
Barrel twist: can't control that, but must play role in velocity vs flight stability.
Results so far: The best groups so far were 0.5inch 10-shot groups with a couple of flyers. But only one out of three 10-shot groups with the same pellet was 0.5inch the other two 10-shot groups opened up to 1 inch. Most accurate were the H&N 5.51mm Baracuda Match heavy 21.1gr, the 5.50mm head size in the same pellet very close. Similarly accurate, but not always consistent were the JSB 18.1gr and the 15.9gr, the AA's Diabolo Field 16gr ; Napier 15.6gr; and the Beeman Kodiak 21gr. As the head size increased towards 5.55mm things got progressively worse. So at least I know that my Daystate barrel is 5.50-5.51mm which confirms what I read from others too. Also, it seems that a velocity of between 820fps and 950fps is a good range to test. But I read that JSBs 18.1gr are best at around 905fps, but not more than 930fps and not less than 880fps. Similar for the Baracudas. The JSBs seemed accurate but with "sideways?" punch marks at 820fps, while still accurate and nice round holes at 960fps but with more fliers. The only pellet that left a perfectly round hole on the target at all velocities was the JSB Predator 16.2gr, due to it's pellet head shape, and also because of its straight flight. I know that certain type pellet heads (hollow point, wadcutter, etc.) leave nice round holes normally, but if they tumble in flight they can leave a sideways mark too,
Question: Without a slow-mo scope cam how can I tell if the pellet is tumbling in flight? Can I tell it from the punch mark it left on the target paper? Are there any "smart" shortcuts or "best practices" in the process of finding the best pellet that would make sure that a potential "gem" pellet does not slip through? I cannot possibly test every pellet for all the velocity ranges! I believe that a goal of finding a pellet that groups three consecutive 10-shot groups at 0.5 inch at 50 yards is not unreasonable for a Daystate Airwolf .22 MVT (unless the shooter sucks)
Thank you for any input, experience!
Edit: before the next shooting I will replace the old Tasco Custom Shop 12-60x56mm scope with a brand new Mueller SF 8-32 as they supposed to hold zero better. I am getting some strange looks at the range anyways about that huge scope on a "bb-gun"