I was in a local shop about a year and half ago and saw one of these laying on a desk. Being a snoop by nature I picked it up and chuckled. The driver of the desk said calmly " you're not suppose to see that ". Unfazed I already had a solid idea as to where this gem had evolved. My first thought was it wouldn't apply to jacketed bullets, but mono's, the sky's the limit. Certainly there was the potential for drag reduction in flight and I knew where this was headed. I placed the bullet back in the box and didn't need anymore information.Very interesting indeed.
I went about by business and left it to stew as all good things require time properly cook.
The originator, Mark Thompson had once again been modestly pushing the edge of his envelope. Having just received a patent on this design he came by my place a couple of weeks to ago to put a few of these bullets in my hand and discuss the benefits.
As everyone knows I am not a proponent of shooting game at extended ranges, but you got to remember I don't like Fried Chicken either. The saying to each his own applies here. But the concept is quite interesting and very compelling. The twist on the bullet mirror the twist in the barrel, at least the barrels he used for testing, brilliant ! hard to machine? not for novice I'm afraid.
The helical grooves do in fact reduce drag and takes some of the drop out of the trajectory equation. Exactly how much? In his 30-378 and at 700 yards he repeatably pulled 7" from the rainbow.
To get a better incite into this marvel I'd contact Mark directly. Will I use any myself ? Anything that slick I've got to be try at least a few times, even if it's only out to 400 yards. Beside he's a homeboy.
Sneaky Mark, very sneaky, well done my friend !