Range Report! Re-barrelled to non-restricted Bushmaster ACR

Every one keeps refering to the ACR as heavy, if you compare a piston AR with the ACR the gap is closed. There is not alot of excess weight on the ACR. The reliabilty of ACR system,the ease of servicing, and the multi cal function is a major plus in my mind easily worth the additional weight if we ever get or build more barrels.

Ian can also build your barrel a little lighter profile to offset the weight of the additional length required as well as incorporate the flash hider into the overall barrel length.

As soon as I can locate the parts I will get him to build me another barrel.
 
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Every one keeps refering to the ACR as heavy, if you compare a piston AR with the ACR the gap is closed. There is not alot of excess weight on the ACR. The reliabilty of ACR system,the ease of servicing, and the multi cal function is a major plus in my mind easily worth the additional weight if we ever get or build more barrels.

Have you held an ACR with a non res barrel then held a Tavor or a AR15. I have (I owned all them at one point) there is a massive difference, it is a front nose heavy pig. I think part of the blame is the quick barrel change system as well as the barrel profile. But remington seems to have fixed the weight issue with its military version. The weight is the reason I skidded the ACR as well as Swiss arms and XCR.
 
there is a vendor on ACR forum that makes aftermarket bolts for the ACR and bushmaster sells all the parts so you do not have to canibalize a barrel.
 
Have you held an ACR with a non res barrel then held a Tavor or a AR15. I have (I owned all them at one point) there is a massive difference, it is a front nose heavy pig. I think part of the blame is the quick barrel change system as well as the barrel profile. But remington seems to have fixed the weight issue with its military version. The weight is the reason I skidded the ACR as well as Swiss arms and XCR.

The weight of these guns is holding me back as well. A piston driven AR 180b with a 20" barrel manages to come in well under 7 pounds and are still reasonably accurate, it's a shame Armalite gave up on that rifle.
 
It may be a heavy rifle but relative to the xcr I had and other guys at the range who own Swiss Arms I find the ACR balances very well and doesn't feel heavy relative to the others.
 
So after picking up our 2012 deer sausage from the butcher and heading out to drop some off with all the landowners that were kind enough to let us hunt this past season, the Gag-man and I got out for an evening Coyote squawk! It was a gorgeous sunset, and the strong afternoon wind died down to just a whisper as the light faded. I had been alternating between blowing my guts out into a predator call, and glassing the rolling foothills for Coyotes, when a whole chorus of coyotes lit up around the countryside. What a great sound!

I was just starting to think that the evening was going to go bust, and had started texting the Gag-Man to discuss throwing the towel in when I saw movement directly downwind.....DAMN! I swivelled to get good position, and quickly cranked my new Leupold Mk6 1-6x24 Firedot back to about the halfway point in it's variable power range. There he was! A coyote crested a terrain swell in the stubble field about 80 yards out. I was positioned on the edge of some scrubby un-cut grass in a small island aspen that flowed down the ridge, and I had questionable clearance over the grass to the coyote. He continued to approach, focused intently on my position, and I felt the pressure as it was going to be mere seconds before he filled his nose with me and turned tail to run. I flicked the safety of my ACR off, lip squeeked as I drew a bead on him, and took up the slack on the Super Geisselle Trigger. I was in a sitting position, and was shooting the rifle unsupported, but braced from under the magwell which had a LAR 10 round pistol mag seated. The rifle balanced beautifully, and the sight picture was rock solid. He stopped at the squeak and I was ready for him......CRACK! Great shot placement rocked him straight over backwards.....WOOHOO! The non-restricted ACR scores again!

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Turned out to be a nice young male. We were unable to call up anything else, and now that we've been out calling a couple times we'll likely have to switch to early-morning-ambush-mode or still-hunting for the next couple outings.

The Leupold VX6 1-6x28 firedot is a really interesting scope. At about 16 ounces and change, it approximately about 8 ounces more than my 2-7x28 rimfire, but still a whole 9 ounces less than the Vortex Razor Gen II. The scope and mount balance nicely, and while it is heavier, it is not so much that the rifle becomes unwieldy. By comparison, the extra weight of the vortex definately kicks the package into the realm of too heavy, but the Leupold Mk6 seems to be just about the right compromise.

The 1 power is fascinating with respect to how well it creates the illusion that there is no scope there, and is as fast as my aimpoints for getting onto target quickly when I'm playing mall ninja in the basement taking on Boris for CQB dryfire practice. Then at the other end, it's 6 power setting collects ample light with sufficient magnification to be easily capable for coyotes at a couple hundred yards right up until last light. The illuminated dot marries in the utility of the red dot, and the overall package still balances very well with the rifle....if anything it balances better as the balance point now rests squarely over the center of the magwell. I've added a QD swivel to the mid-point attachment on the rifle receiver, and I'll my next project will be a sling!

What a great rifle...I can hardly wait to get out again!

Cheers, and thanks for reading....

Brobee
 
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Nice work dude... the country you're hunting looks just like the field behind my house! :)

Interesting to hear about your new optic- haven't heard about this setup, but it sounds pretty sweet!
 
Hoping shrubmaster finally releases the 6.8 kit or a 300blk kit.

+1 big time! Having played with both the 6.8 and the .300 blackout, I think the 6.8 would be a better deer rifle. Vis-a-vis the ease of converting a factory ACR to either, they'd both have conversion issues. I think the 6.8spc would the easiest - a bigger bolt face and possibly a different extractor I'm not sure how the bolts are hardened, so I don't know if you could simple machine out a slightly larger bolt face. Also, the 6.8spc would use different magazines.

The 300 blackout would use the same mags, as well as the same bolt, however the gas system would be markedly different requiring a new piston/op rod, a new op rod spring, and a new op rod guide. I think the blackout conversion would require more tinkering, and it's possible you would bung up the spring or operating rod while monkeying with them.

Anyway....I'd take either if I could get them! I'd love to go deer hunting next fall with the ACR.

Cheers,

Brobee
 
Got out again after work this evening....

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I've had so much fun hunting Coyotes with my non-restricted ACR these past weeks that I decided this evening I'm going to take the plunge and buy another to convert to something I can hunt deer with next fall. I'll send it to Ian at Herron Arms and get him to do either a 6.8SPC or a 6.5 Grendel conversion....I can't decide which caliber yet however I've got a bit of time until I have enough coin to take the plunge, so there's time for debate on which would be better. To potentially help finance the additional ACR, I'm going to sell my Trijicon TR24G's and for the time being go back to my Leupold 2-7x28 lightweight. So if you want to read an after-action range report on a 6.5 Grendel Deerslayer ACR, check out the EE and scoop up one of the TR24Gs!

To be continued once the deerslayer comes alive....

.....and in the interim I'd be very interested in reading folk share their opinions in the 6.8SPC vs 6.5 Grendel department! I'm kinda torn here....Lapua makes 6.5 Grendel brass and while expensive, it is likely beautiful and will shoot as good as one could expect. 6.8 SPC brass has to come from either Remington or Hornady. I think the Grendel's projectiles beats those from the 6.8SPC hands down in the ballistic coefficient department which gives the Grendel the edge in long range department. On the other side of that coin, while I'm not 100% sure I think a guy might be able to get a bit more velocity from the 6.8SPC, albeit with shorter, lighter bullets. This takes the useful maximum point blank range trajectory out to about 250 yards, whereas the Grendel might be a bit more limited to a 200 yards MPBR. I'm also a bit squirrely that the short & fat case of the 6.5 Grendel would be more difficult to get to feed in the ACR by comparison to the longer, narrower case of the 6.8SPC.

Does anyone here have any experience with the 6.5 Grendel in an AR? If so, did you have to do anything exotic to get it to feed reliably? Other observations??

Many thanks for your feedback!

Cheers,

Brobee
 
Why not go .300BLK for the deer gun? Or is it to hard to gas properly in the ACR?

If we could use suppressors here in Canada I would have seriously considered it, but because we can't there are a couple reasons I feel either the 6.8SPC or the 6.5 Grendel would be better.

The first is that the 300 Blackout is definitely inferior in the trajectory department by comparison to either of the other two. Both the 6.5 Grendel and the 6.8 SPC have superior velocity given projectiles of similar mass, and these projectiles all have better ballistic coefficients, all of which is a big plus in my opinion for a gun used to hunt deer.

The second is that the conversion would be much more problematic. This is because the gas system would have to be moved back a couple of inches, requiring a bunch of specialized parts to be fabricated. Yes, the 6.5Grendel ad the 6.8 SPC require different bolts and magazines, but in my opinion these are easier to address than moving the acr's gas system.

Cheers,

Brobee
 
Hmmm....surprised at the lack of interest or discussion/opinions on 6.5 Grendel vs 6.8 SPC.

Decision made then....I'm going with the 6.8SPC.
 
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Nooooooo!

I was kind of hoping that you'd settle on the 6.5. If I remember correctly from ballistic tables that the 6.8SPC has the advantage up close (ie 300m and in) in terms of energy but the 6.5 performs better further out (300m+) but don't quote me on that. Aside from a deer rifle, I think the 6.5 would make an interesting precision/DMR type rifle in a platform like the ACR - being that you could really take advantage of the NR status and stretch the rifle's legs compared to an AR-15 in 6.5. What barrel length were you thinking of?

Just looking at Sierra's website it would look like you have more selection in terms of match bullets with the 6.5 than you do with the 6.8. Just sayin'. :D
 
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