Not very productive back at the bench so glad to keep finding something of interest when I set down. Bruce, help me understand your meaning.
Didn't consider a NASA or know anything about the NASA until someone offered me some to test. But liked it just fine after looking around at images and dimensions (that was prior to Kurt's observation about ogives longer than the shank). One question I had was - upon ignition, as it moved forward would that wide lube groove let pressure escape? After mentally sketching it out I figured it like this, at least for a chamber without freebore. If both driving bands are .001 or .002 larger than groove, wouldn't the front band start to seal the groove nearly as fast as the rear driving bands would on any reduced-band bullet. Or am I overlooking the fact that I've intruded on a PP region of the forum, something I promised to do for the last time about four posts ago Spose it could be you are talking about a PP NASA???
Be interested in your thoughts even if I'm looking at it wrong. Well, especially if I'm looking at it wrong. Might as well learn something since I'm not getting much else done today.