New AR15 caliber...

[h20hunter]

http://www.fieldandstream.com/blogs/field-test/new-ar-round-the-25-45-sharps?dom=fas&loc=hottestblogs&lnk=new-ar-round-the-2545-sharps

Interesting. Anyone have any experience or insight into this. I'm a fan of AR's. I find them fun to shoot and very versatile. For the reloader this looks like one that your .223 case being simply necked up could catch on.

Opinions? I'd think for deer sized game this could be a decent round if you don't stretch it out much.

[grundy53]

Tagging I've heard this new round mentioned but no specifics.

[Special T]

Is it difficult or expensive to "Neck Up" to 25 cal"? I dont reload.

Is there a die available or do you have to fire form it?

[Curly]

Sounds like a great cartridge to me. 

Comparable ballistics to a .250 Savage is appealing.

[JimmyHoffa]

Is it difficult or expensive to "Neck Up" to 25 cal"? I dont reload.

Is there a die available or do you have to fire form it?

Should be pretty easy from .224 to .257.  Don't think an intermediate die would be needed.  Probably not a lot of neck to work with needing trimming, turning.

[Special T]

So is it possible that an existing neck flaring tool could do the work?

[ELKBURGER]

I'm surprised they didn't stop at .24. There is a wide variety of .24/6mm bullets out there.

[JimmyHoffa]

So is it possible that an existing neck flaring tool could do the work?

Since it is semi-auto (AR), you'd likely want to full length resize.  So possible to use new or annealed and FL resize, then neck resize for .257 for the first load.  Then need FL dies for future.  If running in a bolt gun, just neck size.

[headshot5]

I'm surprised they didn't stop at .24. There is a wide variety of .24/6mm bullets out there.

They already have the 6X45mm and 6.5X45mm that work in the AR-15 platform (223 necked up to 6mm and 6.5mm).   

[BULLBLASTER]

This and the 6mm-223 have been wildcatted for years. Just now a ammo company picked it up and is mRketing it?  Biggerhammer was posting about building a 6mm-223 for a while but i think he changed his mind.

[headshot5]

Interesting. Anyone have any experience or insight into this. I'm a fan of AR's.

I've used similar in TC contenders.  6mm tcu, 25 TCU (also called 25 copperhead), 6.5mm TCU, and 7mm TCU.  All are made off of 223 brass.  They work awesome for deer and I've taken an elk with the 7mm TCU.  They are a really fun round. 

The non-improved versions are used in AR-15's, 6X45mm and 6.5X45mm.  You can hit some pretty awesome speeds with them, and are great rounds.  Using 223 brass is huge for reloaders, it makes it nice.

[BULLBLASTER]

I'm surprised they didn't stop at .24. There is a wide variety of .24/6mm bullets out there.

They already have the 6X45mm and 6.5X45mm that work in the AR-15 platform (223 necked up to 6mm and 6.5mm).   

beat me to it.. 

[NW-GSP]

Why not just build a 6.5 creedmore ar

[CP]

So I can just pop one of these uppers onto an AR and i have a legal big game rifle?

[headshot5]

So I can just pop one of these uppers onto an AR and i have a legal big game rifle?

Yeah it'd be legal for big game in Washington (.243 minimum diameter).