Re: 375/408 Banded Solids Test
These Von Karman projectiles are seven calibers in length, and are designed to function optimally from an exponential gain-twist barrel with an exit rate of ~20 calibers. In the case of Terry's .375, this would translate to a 1: 7.5" twist, which is slightly tighter than the 1: 8" constant-twist Lawton employed with a degree of success recently.
The .338 would require a still tighter rate of 1: 6.75".
A recent fall in copper prices has helped my pricing structure. The projectiles will be more than competitive with comparable solids, but I want to make the necessary refinements prior to formal marketing.
2,800fps-plus barrel exit perturbations/blast instability needs to be resolved in the, otherwise, dynamically stable flight properties of this design. There is also need to ensure that the engraving bands are stout enough to be interchangable with a constant-twist rifling geometry.
It should be noted that this is only the first component of a complete ELR barrel/cartridge system.
Last edited by noel carlson; 03-03-2009 at 05:15 PM.