AR 15 caliber options

[luvmystang67]

I just built myself a 6.5 Grendel.  The 123 grain SST loads are back from Hornady recently for under $1 per round.  There have been a slew of barrels with short chambers (at least relative to the factory loads) so try to make sure any one you get for grendel has the right throat length.

A quick word on new bolts... its like a $40-60 swap on your BCG.  Really NOT a big deal at all.  I would not let a bolt swap make or break your build.  Swapping a bolt out is approximately 1000x easier than installing a new barrel.  The mags are just an afterthought.  For grendel specifically, when I hold the "grendel" mags I have up next to my aluminum 5.56 mags they are IDENTICAL.  The 5.56 mags have the same size and shape follower on the ones I got as well... I haven't tried my grendel rounds in the 5.56 mags yet, but I anticipate they'll work just fine in the particular ones that I have.

+1 for the grendel, its a sweet round.

[GLShooter]

6x45
25x45
6.5 Grendel
6.5 LBC
6x6.8 SPC
25x6.8 SPC
6.5x6.8 SPC
6.8 SPC II
6.5 PCC not PPC.


I'm a big fan of the 6.5-Grendel.

 
Lilja Barrels   

My first ar build 6.5 AA Grendel

Lilja doesn't chamber many of those. You forgot one of the best in the 243LBC.

The 6X45 and 25X45 use same 223  mags and bolt. They need just a barrel

The others take barrel,  bolt and magazines.

All are available from BHW. I own and shoot all but the 25X45.  I designed the 25X6.8 and helped on the 6X6.8 and the 6.5X6.8 as built by BHW. Heads up the 6.8  variants out run the same bore size Grendel/LBC choices thanks to the higher operating pressures.

Greg

[6.8mmARHunter]

For the 6.8mm SPC II, you'll need a different bolt, barrel, and magazines.

No one would swap barrels and bolts back and forth to shoot one cal (example 5.56mm) vs. another (example 6.8mm SPC II), they would just build a complete second upper. Then, you just swap out the whole upper (takes less then 60 seconds) and you're shooting something different.

The 6.8mm SPC II and the 6.5 Grendel seem to be about the most common of the list that Bighammer posted. You'd probably be good with either.

Here are the forums for both:

http://68forums.com/forums/

http://www.65grendel.com/forum/

Good luck. Let us know what you decide. Post pictures of the rifle...



sam

[webbspinner]

I recently got a 6.8 spc in a RRA mid length specifically for hunting deer on the wetside.  Impressed by the accuracy and its fun to shoot, I have some 115 fusion and 120 sst and 110 vmax, shoots all real well.  quite a few options for loads and of course loading your own.  think I prefer my 338 for elk but with the right range and right shot I am certain it would drop a elk.  They get great reviews on hogs, deer and even bear.  will be picking up a 5.56 soon so I can shoot more and become more familiar with the platform but very happy so far.

[Heredoggydoggy]

I recently got a 6.8 spc in a RRA mid length specifically for hunting deer on the wetside.  Impressed by the accuracy and its fun to shoot, I have some 115 fusion and 120 sst and 110 vmax, shoots all real well.  quite a few options for loads and of course loading your own.  think I prefer my 338 for elk but with the right range and right shot I am certain it would drop a elk.  They get great reviews on hogs, deer and even bear.  will be picking up a 5.56 soon so I can shoot more and become more familiar with the platform but very happy so far.

You will find that there is very little difference in the recoil of your 6.8 and the 5.56.  I have both, and like them.  I recently built an AR in 6mmX6.8 SPC, and it's a screamer!  Plus, it's still legal for deer hunting--(6mm=.243cal.) 

[crazysccrmd]

I have a BHW 25x6.8 and it is essentially a semiauto 250 Savage. I get 75s at 3250, 87s at 3100 and 100s at 2900 out of an 18" barrel.

[CAMPMEAT]

www.model1sales.com