The KE was measured with velocity by Hector. Using 15.89 JSB the KE at muzzle measured 24 ft/lbs and the velocity is whatever it takes in .20 with those pellets and weights to get 24 ft/lbs. This is truly an "upper" limit to the D48 design and not one he (Hector) used for himself to stabilize his entire rifle with JSB .20 Exact 13 something grainers (the "standard" JSB .20 about 3 or 2 grains lighter than the so called "heavies".
However, in .20 the gain or loss of projectile weight is more critical than say a .22 or .25 where more grains or less grains can be adjusted to fit a ballistic design.
I paid for Hector to build exactly a rifle like his able to handle the HEAVY .20 JSB 15.89 and he did it even though it wasn't along his professional knowledge to exceed the standard .20.
Well it DOES!
Lewis,
But mine is engraved 27 von 30 and yours that you may buy in .20 HAS to have a number out of 1-30. What is it?
However, in .20 the gain or loss of projectile weight is more critical than say a .22 or .25 where more grains or less grains can be adjusted to fit a ballistic design.
I paid for Hector to build exactly a rifle like his able to handle the HEAVY .20 JSB 15.89 and he did it even though it wasn't along his professional knowledge to exceed the standard .20.
Well it DOES!
Lewis,
But mine is engraved 27 von 30 and yours that you may buy in .20 HAS to have a number out of 1-30. What is it?
