IF (and that's a big if) the drag is less when shot from a Poly barrel, then the wind drift would be less as well, assuming the muzzle velocity is exactly the same.... However, if the MV is different, the drag will be different as well, and depending on what part of the drag curve you are, that velocity change may change the drag and drift as well.... Wind drift is proportional to pellet drag, assuming the weights are identical.... However, a heavier pellet (of the same caliber) with the same drag will have less wind drift.... Bob
Once a projectile leaves the barrel isn't the drag or BC dependant on the projectile rather than the barrel it came from?
I couldn't quite get the detail I wanted in the above pics so took the following as well.(added some arrows here because it's just so hard to see the engravings with the poly)
Doug,I think Zack meant one distance, and one pellet type. Not just one shot. At least I hope that is what he meant...Else, I agree that the test needs to be split back and forth to average out unsteady wind.
Thanks Bob,If pellet wobble as it emerges from the muzzle is driving the BC down, might one see that as velocity loss in a windless indoor range? Either measured with a chronograph, or as a lower POI.If a reduced BC outdoors explains the wind drift when using some barrels, would the pellet drop over range outdoors not also indicate a greater velocity loss? Perhaps two similar chronographs can be placed at 1 yard and 50 yards to measure a number of shots. Then the chronographs can be swapped, and the results used to null out chrono calibration.Of course, it is easy to design burdensome tests for someone else to do