I think it looks interesting. The case is one that I've thought should be more prevalent. Though the expense is likely the holdback. The only significant downfall I see... they plan to release the cases for future chamberings - with no current production matching.
As such, likely destined for a short life.
Makes sense to use a stainless steel base to handle the 80,000 psi chamber pressure (required to get a .270 bullet going 3,000 fps from a 16" barrel, but I think long-term testing in temperature extremes at full-auto is required to see if the steel casehead base separates from the brass case body under extraction extremes.
:: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets
Could be SIG doesn't want you to reload this hybrid cartridge. If you wanna keep shootin' ya gotta buy more ammo. But... we shooters will find a way to get'er done.
I refuse to be victimized by notions of virtuous behavior.
Old Bob Wrote:Could be SIG doesn't want you to reload this hybrid cartridge. If you wanna keep shootin' ya gotta buy more ammo. But... we shooters will find a way to get'er done.
I read componets will be "made available" but at what cost and will it be feasible to reload them? Bullet choices at present are on the slim side.
I went to the JBM Ballistics Calculator and worked up some charts (attached) comparing the claimed specs of the 277n SIG Fury vs Hornady's 6.5 Creedmoor 140 ELD load.
65CM holds its own quite well at 2710 fps with a 0.655 BC bullet vs. the 277SIGF at 3000 fps with a 0.506 BC bullet — until you remember the 277 is supposedly 3000 fps from a 16" barrel!
:: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets
Currently a proprietary barrel and extension/nut. Gonna have to wait for someone to figure out how to duplicate it, then...yeah, down to a 6 or up to a 7. Get some pills with some good BC numbers and that will change the LR and ELR game....never mind the Hunters who make up the majority of the market.
Their (Sig) website shows 6.5CM, .308 and .277 in 16 and 18 barrels.
Barrel life has to be the next step in rifle evolution. Rifled Ceramic, Tungsten or Cobalt inserts. Might be something polygonal rifling will do good with. Maybe a gain bore (.280 at the throat, .277 a the 6" mark
There was and maybe still is a company that was making a 2 piece barrel. The chamber that was screwed into your action, then the barrel screwed into the chamber so the lands were right there at the end of the threads and the chamber ended right at the SAMMI case mouth.
I rest my case on the increased recoil. It's plan too see in the vid. That dude got his butt rocked by the recoil when he did a 3 round burst. At the beginning of the vid.
Watching the other guys shoot you can clearly see the recoil compared too 556,6.8,6.5,7.62x39 and creedmoor is much more and slowing down their reingament times.
So yea I don't see this as a improvement on something meant to be used in close range or room to room fighting.
If someone wants to fight that much recoil in a cqb weapon they can do it much cheaper with 308.
Sig released a video stating the 6.5 and .308 calibers, and a 24" barrel coming.
I am still waiting on someone to mention barrel life. The market is hunters, so the barrel will last long enough for the hunter to buy the latest and greatest.
Target shooters may get a little irked that they have to chase the lands after every couple hundred rounds, then start over after the 800 round mark with load development.
Match/Gamers are kind of out on the HP market as just about every match has a speed limit set between 3000 and 3200 fps, and a lot of 6.5cm guys are hand loading ammo to get 2900+ already...unless it is all to get a light rifle on the shooting line.
