Robinson Armament XCRs - Range Report!!

Brobee: Interesting observations Re: vertical stringing of groups on the XCR-M.

I have not had this issue come up in the ~1500 rounds fired through my XCR-M. Rapid fire 10 round groups at 100-300m with irons and they all seem to be in the 2-3 MOA range with no vertical stringing exhibited as the barrel heats.

Has anyone else experienced vertical stringing of groups in their XCR-M ?
 
Brobbe, Here we go; we have conflicting reports.What say you?
Also, what optics were you using.
Im also gonna call b.s., no matter how rude it sounds, that shooting any gun, off of the mag, is a better way.
Thats ludicrous. I just want the truth, so i can make an informed decision. I was gonna buy two of these, now im at none because of your pics of the groups,
then i find this;
www.canadiangunnutz.com/forum/showthread.php?t=707886
 
Brobbe, Here we go; we have conflicting reports.What say you?
Also, what optics were you using.
Im also gonna call b.s., no matter how rude it sounds, that shooting any gun, off of the mag, is a better way.
Thats ludicrous. I just want the truth, so i can make an informed decision. I was gonna buy two of these, now im at none because of your pics of the groups,
then i find this;
www.canadiangunnutz.com/forum/showthread.php?t=707886

Brobbe groups with the M are what he shot, and Wolverine are what they shot. Its not like anyone is trying to make things up.

Has anyone else experienced vertical stringing of groups in their XCR-M ?

xcrforum has reports of virtical strings but for xrc-l, i dont think its specific to the M.
 
Brobbe groups with the M are what he shot, and Wolverine are what they shot. Its not like anyone is trying to make things up.



xcrforum has reports of virtical strings but for xrc-l, i dont think its specific to the M.

So then it would be the shooter? And not the gun?
 
So then it would be the shooter? And not the gun?

I dont know, each case could be different, on the other forum the gun has gone back to be checked.

It could be brobbe gun had a problem, all he is doing is providing his experience with the M.

I have not shot my M enough as its gone back for a new upper but in 4-5 weeks when i get it back i will try 100 & 200 yards and post results.
 
Different shooters, different guns,different ammo, different day,......Different results.

Thanks for the very well written reviews Brobee!
 
Well, as I was not present I can't really comment on the "conflicting report" regarding a thread posted by an employee of the sole Canadian Robinson Armament Importer.

Reading their thread leaves me with the impression that it provides significantly less detail than the review I wrote, and therefor does not really contain enough information for me to develop a critical opinion.

I was pretty open with my testing protocol, ie 10 round groups shot from a cold barrel. It would have been easy for me to break the strings of fire into smaller strings, which would have resulted in a couple of groups that were sub MOA. My opinion of that type of protocol though is it is too limited in scope and results in a skewed perspective on the rifles capabilities.

Regarding your "bs" statement, believe what you want and spend your money accordingly. I accept no responsibility for ruining your purchasing plans, my thoughts being you shoukd man up and drop the $$ to find out yourself and develop your own opinion (as I did, paying significantly more $$ than you will have to down in the us) regarding the subject toy. Regarding your "truth" statement you imply that one of us is lying. I would suggest that it is possible for us both to be telling "the truth", given they were certainly not the same rifle, same ammo, same shooter, or same testing protocol.

All I can offer is my limited perspective and opinion, which I share details about how both were developed. The result? I am very happy with my XCR-ls in .223 & 7.62x39, both of which are capable of performing sub-2MOA in my hands. After purchasing and testing a .308 Xcr-m (which I was more excited about than the smaller caliber guns and thus did load development for first), I wound up feeling disappointed so I sold the gun and bought another .223 Xcr which I am also very pleased with.

Lastly, I had a tonne of fun doing the testing and am grateful there are companies like RobArms who continue to work hard to bring us new choices of stuff to shoot. The .308 Xcr is just not for me, but I love the light version.

None of this is meant to be rude; best of luck with your purchasing decision.

Cheers,

Brobee
 
Well guys, it is starting to sound like someone wants this thing to shoot 2 MOA or better no matter what conflicting reports say. Well I would say Brobee's statement puts it best, buy one and shoot it then. I had people tell me the XCR-L in 7.62x39 was 5 MOA at best. Well I was getting 3 MOA off a bi pod 10 shot groups.

Call BS all you want, buy one and do better. Enough said already.
 
I personally can't stand it when people buy a gun, then proceed to trump up it's abilities (or those of the shooter) to bolster their ego or their decision to purchase said firearm. Firing 3 or 5 rounds in a group is a real good indication of poi but fails to indicate practical accuracy IMO.

I have heard and experienced the stringing in the 'L' model, and had assumed this to be true of the .308 versions when they came out as well. I always hear of stellar accuracy from owners who post distances and groups with no other info, problem is I never see these same guns and owners repeat their performances in person.

Good on you Brobee for your candor!
 
Well, as I was not present I can't really comment on the "conflicting report" regarding a thread posted by an employee of the sole Canadian Robinson Armament Importer.

Reading their thread leaves me with the impression that it provides significantly less detail than the review I wrote, and therefor does not really contain enough information for me to develop a critical opinion.

I was pretty open with my testing protocol, ie 10 round groups shot from a cold barrel. It would have been easy for me to break the strings of fire into smaller strings, which would have resulted in a couple of groups that were sub MOA. My opinion of that type of protocol though is it is too limited in scope and results in a skewed perspective on the rifles capabilities.

Regarding your "bs" statement, believe what you want and spend your money accordingly. I accept no responsibility for ruining your purchasing plans, my thoughts being you shoukd man up and drop the $$ to find out yourself and develop your own opinion (as I did, paying significantly more $$ than you will have to down in the us) regarding the subject toy. Regarding your "truth" statement you imply that one of us is lying. I would suggest that it is possible for us both to be telling "the truth", given they were certainly not the same rifle, same ammo, same shooter, or same testing protocol.

All I can offer is my limited perspective and opinion, which I share details about how both were developed. The result? I am very happy with my XCR-ls in .223 & 7.62x39, both of which are capable of performing sub-2MOA in my hands. After purchasing and testing a .308 Xcr-m (which I was more excited about than the smaller caliber guns and thus did load development for first), I wound up feeling disappointed so I sold the gun and bought another .223 Xcr which I am also very pleased with.

Lastly, I had a tonne of fun doing the testing and am grateful there are companies like RobArms who continue to work hard to bring us new choices of stuff to shoot. The .308 Xcr is just not for me, but I love the light version.

None of this is meant to be rude; best of luck with your purchasing decision.

Cheers,

Brobee

Well said sir, well said.
I did not mean that someone was lying, though it's possible.
Just trying to figure how two guys could have vastly different groups from the same batch of guns.
I read your experience and it is similar to mine, (except shooting off the mag part). I thought your report and candor were excellent as well.
To guess, either the quality control is just horrible over at rob arm,
or where they are getting their barrels,
or someone is fudging on that group pic, either yours or the other guy.
I did not know he was the sole importer in Canada, so that's interesting to say the least.
I still have not heard from the guy on here who had 4.25 inch group at 600 yds.
I had a FAL that shot as bad as your XCR-M and sold it for same reason.
I think you put it best when you said, I'll just have to pony up the money & find out like the rest of you.
Being that you responded to my inquiry quite well, and so far the sole importer has not, that pretty much takes care of it for me.
That and at least one, and possibly two guys on here have sent their uppers back.
Im gonna pass.
Dam Shame, great, reliable operating system.
Good on you Brobbe for standing up to the scrutiny.
Its nothing but crickets so far from the other guy.

ETA; any chance you just had a brain fart and did something goofy like not checking the barrel bolt, or something?
Not being a wise guy, it's just after 30 years of shooting even i have done stuff like that before. I once forgot to trim my cases
on my reloads and went to a precision match with a gun that had a very tight chamber. Half of them wouldn't chamber and i lost every timed
event trying to clear rounds that wouldnt chamber. So ive done it.
 
I would love more details on those targets.

It is exactly what I want for EESA's 300m range.


Specifically I am interested in the mechanical linkages.

It's down at the machine shop right now being replicated so we will have 3 or 4 to shoot. I'm hoping to have them done sometime in the next 4 to 6 weeks wherein we'll get them back out to the range and do a dedicated review/hardcore test drive then. It's a "interested, but freebee" type project for the machine shop though, so whenever they have time is when it will get finished and I have no leg to stand on to pressure them what-so-ever.

In the interim I'll see if I can't get down there next week and take some photographs for you if you like. Conceptually, there is a highly reduced (ie:256 to 1) 12 volt gearmotor that's attached to a large wheel (approximately 7 inches in diameter. The wheel has a notch cut out of it such that a proximity switch can see when it's gone one full revolution, and the wheel has a single pivoting attachment which allows it to drive the linkage arm. The linkage arm is attached along the outer circumference of the wheel with a stainless steel pin and some snap rings. The other end of the linkage arm is connected to the head of a hammer-like arm, the other end of which is captive in a hinge directly behind and slightly lower than the hinge of the falling plate. A second poximity switch is located in a bracket mounted to the housing and senses when the plate falls down. A logic circuit/relay controls the motor so that when it sees both proximity switches in the off position (ie: not seeing steel) it turns off power to the motor, however if either of the proximity switches sees steel then the motor is on.

When at rest, the hammer-arm is in the down position, and the notch in the drive wheel is aligned with the proximity switch such that it sees "no steel" The falling plate is up, so the second switch also sees "no steel". When the plate falls, the second switch sees steel and turns the relay on. The drive wheel rotates, it's notch coming out of alignment so it's proximity switch now sees steel too, continuing the "motor on" logic in the relay. As the plate stands up, the second prox switch goes cold, but the first one still sees steel and keeps the motor on until the wheel has completed one full revolution and the notch comes back into alignment with the prox switch, turning it off. With both prox switches off, the relay switches off the motor and everything waits until the plate falls down again.

The motor we picked is well sized...it stands up the half inch thick, 12 inch diameter plate with authority.

Hope this makes sense...will post pictures and a video as soon as I can get them.

Cheers,

Brobee
 
On my XCR-L 223 Rem vertical stringing = loose gas block!
Tight gas block = tight vertical groups ;)

Before owning an XCR, I never knew that a gas block could loosen up...

Alex
 
On my XCR-L 223 Rem vertical stringing = loose gas block!
Tight gas block = tight vertical groups ;)

Before owning an XCR, I never knew that a gas block could loosen up...

Alex

I have seen both gas blocks, and the barrel loosen to the point of failure on the XCR. I have also seen the ejector, and the bolt release come loose to the point of failure.

I have found a loose barrel bolt causing wandering zeros on the XCR. Issues like this is why it is so important to see a large # or rounds in any group used for analysis. So often with this platform, people see a small number of rounds close together and assume that the rifle is that accurate. A dead give away when these groups are posted in vanity posts is that they are not centered on the point of aim.
 
I have seen both gas blocks, and the barrel loosen to the point of failure on the XCR. I have also seen the ejector, and the bolt release come loose to the point of failure.

I have found a loose barrel bolt causing wandering zeros on the XCR. Issues like this is why it is so important to see a large # or rounds in any group used for analysis. So often with this platform, people see a small number of rounds close together and assume that the rifle is that accurate. A dead give away when these groups are posted in vanity posts is that they are not centered on the point of aim.

So are you saying that if the rifle is not assembled correctly the rifle isn't accurate? If the operator keeps on top of bolt torques it will be accurate?
 
What happened to the Pics?

Brobee,

Thanks for the extremely well-written reviews! Just wondering though, you make reference a few times to pictures ("see below" etc) that don't seem to be on here! I loved the target prototype videos and am looking forward to the pics you've promised in response to Stormbringer, but as far as your groups and the other pics you refer to in your reviews, I respectfully submit that

:needPics:
 
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