Home Forums Hunting & Shooting Hunter's Campfire 270AR SPR (New AR-15 cartridge coming this fall)

Here's a chart comparing the 6.8SPC II to the 270AR SPR using the same bullet but the 270AR data is from a 2in shorter barrel. Both barrels are 1/11 twist. Its basically adding over 100yards of effectiveness. In other words its like shooting at a deer from over 100 yards closer every time (as far as impact) when using a 270AR. You can see it in the data. We would see an even larger difference if both data was from the same barrel length.



EDIT: Correction to the data. The 270AR is from a 18in barrel. I corrected the chart.

LOL

Well not for aim lol but as far as impact. You still need to get the bullet in the right spot. Yeah probably could have worded that better.

Sounds like something I would be interested in. The 223 is good for varmints but I would like something to use on bigger stuff.

Figured you'd have nothing, you never do. Please carry on with Newton rifle hunting experience, I'm sure it trumps Salcal.

Compelling you are...

Hello Christ, you can't make up that kind of stupid. Maybe Tenballlicker will be along shortly to help.

SanCal, how many deer have you killed?

So you don't have one? So there is no way of knowing what the speeds will actually be then. At least over a few years of watching new rounds come out, well more than a few really, its been my estimation I"ll believe it when I see it.

Some do it, and many don't.

So this thing is a 30 AR necked down to .277 from what I am reading then? Yet the 30 AR is not an AR round? But the 270 is?

So, I was thinking of getting one of these:

http://www.dtechuppers.com/ar-15-wssm-upper-receivers.html

I absolutely love the .243 WSSM, but in a heavy varmint bolt rifle. The thing nails the little sage rats out to 350 yards and so far has done so while shooting groups in the low .2's to .3's, depending on me. In the Dtech upper the case can be necked up to 6.5, .308 or .358. Downside is that the brass is seasonally produced, but I have several thousand cases on hand. Just for fun I stuffed a few dummy .243 WSSM cartridges loaded with Barnes 62 grain Varmint Grenade bullets @ 2.240" AOL into a Colt magazine and they fit and functioned flawlessly, although in a single center stack.



The nominal OAL of the .243 WSSM is 2.360", drop that to 2,240" max and they should feed through the standard AR-15 magazine.

The velocity of the Barnes bullet is 3,587 fps out of my Brux 24" barrel. A 95/100 grain Nosler Partition can be driven up to 3,010 fps with Rl-15, or 3,222 fps with VV N165 in a 24" barrel. Now we have a .535" case head diameter and more powder capacity. In either case head diameter that capacity is going to be diminished by the need to seat heavier bullets deeper.

Sometimes we have great notions, but still the AR-15 was a compromise and not really the perfect platform for flexibility, yet for the tinkerer it offers hours of fun and frolic.

A 15 round 6.8SPC PRI Mag will fit 10 270SPC rounds.

The developer is going to take some pictures of loaded brass and post them on another forum. If he does ill share them here.

Well lets home it delivers 200 fps more than the doggy 6.8

Could you address this post please?

Luck

SanCal, how many deer have you killed?

How many have you killed RL? Hell, while we're at it, how many PEOPLE have you killed?

9 deer, not enough to be an authority on killing them with certain cartridges, but experienced enough to know it don't take much to put them in a freezer.

As for killing people, don't be a dumb ass you stupid piece of [bleep]..

How's that for an answer, [bleep] for brains?

How many Tiger strips polar bears have you killed in Kansas? If none then how can you put a ballistic chart together? Seriously? Asking about someones hunting history in this thread about ballistics is just a sorry troll attempt to take this discussion off topic so we don't discuss hunting with AR's.

You're discussing killing deer with a theoretical cartridge. You're postulating on the superiority of a cartridge, when you have no first hand knowledge of its performance. Basically, you're talking out your ass.

Charts don't mean jack chit when the rubber meets the road.

"Its like shooting deer from 100 yards closer.."