270AR SPR (New AR-15 cartridge coming this fall)

[Xcountryrider]

Constructor do these stack single or double in a 6.8SPC PRI mag?

[constructor]

Constructor do these stack single or double in a 6.8SPC PRI mag?

They double stack...or stagger stack. The one below is far enough under that it pushes the one above up instead of pushing out and making the mags bulge like the Grendel does.

In order in the photo- 5.56, 264LBC/Grendel, 6.8x45GPC, 270AR, 6.5x47, 308
When hot linked the image here shows up the size of a football field.- http://m.b5z.net/i/u/6132121/i/6.8x45-270AR.jpg

[chicoredneck]

Interesting wildcat. Hope it goes well for you. So the 130vld bullets will fit in a standard mag and the chambers are cut to precisely shoot them (bullets seated close to touching lands)?

[constructor]

Interesting wildcat. Hope it goes well for you. So the 130vld bullets will fit in a standard mag and the chambers are cut to precisely shoot them (bullets seated close to touching lands)?

Yes the 130s will work when loaded to 2.295-2.3 in PRI 6.8 mags, the leade/freebore is a little shorter than the 6.8 to work better with these longer bullets.

[gun toting monkeyboy]

LOL.
Methinks you are not a typical hand loader...

You can say THAT again.

-Mb

[milotrain]

Like I said earlier...this is a wildcat. I have no plans to produce ammo for this...and really wasn't planning on advertising it other than on 6.8 forums.

One can learn a lot from the FAQs a company chooses to post, how they think about their process and how they think about solutions. Your FAQs are very well reasoned and contain none of the FUD one normally finds. This round looks interesting, but like almost everything I'll let others do the economic R&D before jumping off any sort of ledge. Wildcats are great if you are really committed to them, they are not for the beginner typically.

[Bhobbs]

Aren't people having issues with 7.62x39 bolts failing? Wouldn't an even larger .308 bolt face create more problems?

I'd like to see pictures of the bolt either way.

[constructor]

Aren't people having issues with 7.62x39 bolts failing? Wouldn't an even larger .308 bolt face create more problems?

I'd like to see pictures of the bolt either way.

It's not your normal AR15 bolt.

[Fjold]

In the original post it says that it is adequate for Elk but the "HITS" chart that posts with it says that it isn't.

[Xcountryrider]

In the original post it says that it is adequate for Elk but the "HITS" chart that posts with it says that it isn't.

The chart is based on shooting a 130gr but my Elk (Wild *** Guess) WAG is based on shooting a 140 gr at 2700fps. According to HITS that puts it in the 900+ Elk category. Of course that assumes good shot placement and not a slop shot. With a 140gr and a muzzle velocity if of 2700 you get a HITS score of 987.

[SDgarrick]

Super interesting design and I like the .270 bore, but i have to ask, for hunting applications, why not just use a .270 bolt (or slide action) gun?? My guess is just becuase we love the AR platform and because we can.

[constructor]

OK, I didn't mean to advertise here and don't want to burn up any more bandwidth. I am outta here, if you are interested you will need to join 68forums.
Thanks
H

[vliberatore]

I bet the guys in the Hunting subforum are laughing right now

[Fjold]

The chart is based on shooting a 130gr but my Elk (Wild *** Guess) WAG is based on shooting a 140 gr at 2700fps. According to HITS that puts it in the 900+ Elk category. Of course that assumes good shot placement and not a slop shot. With a 140gr and a muzzle velocity if of 2700 you get a HITS score of 987.

But, that 987 score is at the muzzle. At 100 yards you'd be less than 900 HITS.

I've taken two Elk at <100 yards during muzzle loader season but my normal shots with a rifle have been between 200 and 400 yards.

[Xcountryrider]

But, that 987 score is at the muzzle. At 100 yards you'd be less than 900 HITS.

I've taken two Elk at <100 yards during muzzle loader season but my normal shots with a rifle have been between 200 and 400 yards.

I ran the numbers for Hornady 140gr SST with a BC of .495 and looks like you'd be ok for shots close to 200yards. Its not like the HITS score is an exact science its just meant to help you see if your in the ballpark. No 5.56mm ever gets a HITS score above 500 but they drop deer all the time.
FPS HITS
2700 0 yards 987
2595 100 yards 948
2344 200 yards 856