It used to be the Windrunner. We bought it and fixed it.
–Nemesis Arms Owner/President David Ives
I was thoroughly impressed with this rifle. Shoots .243, .260, 6.5 Creedmoor, .308, .338 Federal — 5 calibers using the same magazine and bolt, just change the barrel. The bolt lifts and slides easier than my Weatherbys. The trigger is sweeet and shooting the 6.5 Creedmoor round at 800 yards at Bass Pro Shops’ Media Day at the Range was a blast.
I could see the modular rifle-action concept if it accepted calibers that required differing length bolt throws, so you could transition from, say, a .243 to a 300 Win Mag and then up to a .338 Lapua Magnum. That would be a very handy rifle.
No one has mastered the difficult mechanics involved for different lengths of ammo though, so your only real choice is how heavy a bullet you want to throw at a target based on caliber – you cases will be about the same size, so your speed choices will be limited by that.
The unstated problem is what optics will handle settings for all the different calibers and be able to adjust seamlessly between them. That also makes for some limitations in choice.
Carrying them is bulky, but I can probably buy 4 Savage FP12-type rifles, with adequate optics for their respective calibers, for what setting up just one of these modular rifles would cost.
They’re working on .300 WinMag but it’s not ready for prime-time. IIRC H.S. Precision (spit, spit) had the same concept in their takedown rifles and I thought if you started with their long-action receiver you could get bolts and barrels for shorter-length cartriges too. IMO Nemesis Arms’ rifle is more compact and pleasantly elegant in a number of respects.
On optics, the rifle at SHOT sported a NightForce scope, and David Ives said that there was no zero-change between calibers (with the obvious caveat that there is a different zero for each). Thus, if, say, you have a .243 and .338 barrel, you can dope the clicks between each zero on the scope, and then swap barrels to your heart’s content without any zero change except clicking in to your prerecorded settings for each caliber.