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- Thread starter Caliber 22
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I'd guess the moee round domed would / should have better long range the a hemispheric/ oval . Then I assume weight, length may play in to the overall pellets balance?
I'd also imagine most just look at what they find best between 10m 25y as most average shooters do then type gun and power/fps.
Like any pellet it's to find what one serves your need best wether a wad for 10m or whatever at 100y.
I'd also imagine most just look at what they find best between 10m 25y as most average shooters do then type gun and power/fps.
Like any pellet it's to find what one serves your need best wether a wad for 10m or whatever at 100y.
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With a sufficient level of measurement resolution and precision, I think you'll find most pellets to exhibit some degree of ovaling. A lot of times it can be picked up with something as crude as a dial caliper (meaning approx. half-thousandth resolution), but sometimes needing a micrometer to discern.
As a singular variable looked at in isolation, I don't think heads being slightly out-of-round holds much predictive value as to how a tin of pellets will group. The spin imparted by the rifling is there to counteract it and other variables like the pellet’s weight bias (a little heavier on one side than the other) or slight geometric/aerodynamic asymmetry (a little ding in the skirt, some subtle mold flashing, etc.). Without the spin, these defects would cause each pellet to veer off in some apparent random direction. But by spinning it, the defect is constantly changing the direction it wants to veer off...just imagine it as an invisible hand that nudges the pellet at the 3 o’clock position, then at the 6 o’clock position, then at the 9 o’clock position, then at the 12 o’clock position. And around and around it goes, constantly being nudged back into some averaged middle trajectory.
Granted in severe cases it's surely an impediment but a deficiency in roundness calls into question overall quality control like the aforementioned geometric or gravimetric inconsistencies. After several years of measuring and weighing, I eventually realized the only way I've been able to improve my odds of getting an outstanding tin of pellets is to sample the better brands (JSB, H&N, RWS, Norma, QYS) at different times in order to get pellets made from different molds (or molds at different stages of their life cycle).
As a singular variable looked at in isolation, I don't think heads being slightly out-of-round holds much predictive value as to how a tin of pellets will group. The spin imparted by the rifling is there to counteract it and other variables like the pellet’s weight bias (a little heavier on one side than the other) or slight geometric/aerodynamic asymmetry (a little ding in the skirt, some subtle mold flashing, etc.). Without the spin, these defects would cause each pellet to veer off in some apparent random direction. But by spinning it, the defect is constantly changing the direction it wants to veer off...just imagine it as an invisible hand that nudges the pellet at the 3 o’clock position, then at the 6 o’clock position, then at the 9 o’clock position, then at the 12 o’clock position. And around and around it goes, constantly being nudged back into some averaged middle trajectory.
Granted in severe cases it's surely an impediment but a deficiency in roundness calls into question overall quality control like the aforementioned geometric or gravimetric inconsistencies. After several years of measuring and weighing, I eventually realized the only way I've been able to improve my odds of getting an outstanding tin of pellets is to sample the better brands (JSB, H&N, RWS, Norma, QYS) at different times in order to get pellets made from different molds (or molds at different stages of their life cycle).
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Probably not too many have measured them like that... I'd not worry about it if the groups are tight, because the pellet's head and skirt are being "sized" and rounded accordingly into the rifling anyway.
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Some barrels will size the entire circumference but many do not. Barrels with a significant choke will do that. But in barrels with a modest choke or no choke, the pellet head should only be touching the lands.
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If Pellet heads ARE NOT ROUND .... they will NOT spin true and be YAW FREE.
Reason for is with the odd pressure of the rifling biting into the pellet head the pellet won't be centered true with the bore and start out a tad off axis and leave muzzle in a wobble ... Think football thrown with similar flight characteristics
Reason for is with the odd pressure of the rifling biting into the pellet head the pellet won't be centered true with the bore and start out a tad off axis and leave muzzle in a wobble ... Think football thrown with similar flight characteristics
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Anywhere from so small as to be barely skating along the lands, to as large as taking on significant engraving from the lands but not touching the walls (grooves). In other words, the heads need to be big enough to be fully supported in the bore so the pellet cannot tip (pitch or yaw), but not so large that they smear against the walls.
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Like the 3 bears .. not too loose , not too tight but just right. ..
. Another thing maybe is using a clip can affect the pellets when feeding them in . Sometimes just enough damage to cause nice fliers ..
I also for my stuff loos shoot worse then tight , then tight serm to add stress and low/ slow .. pellets can be fickle..
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