Rob XCR Match Barrel

I would likely start with the ammunition. Tuned handloads is likely the first place to start. It opens up the possibilities of a wide range of bullets that can be used, is less expensive than factory offerings, and the ammunition that can be made can surpass that of all but the very best factory match ammo.

For those that don't already hand load, for the cost of a match barrel and fitment (that you don't know for sure whether it will perform any better) you could be outfitted with a loading setup. If after the exercise of tooling up to hand load, one finds the gun still doesn't perform any better, they are still left with the ability to produce better ammunition for cheaper, instead of a spare barrel no one wants.

Just my observation based on experience.
 
Just as a matter of interest, I was at the range with my XCR today, doing some more break in on the 7,62x39 conversion barrel. Using store bought S&B 123 gr ammo with a a zero at 100m I found that the drop at 200m was between 8-9 inches. Once I've collected enough of my brass I'll try some reloading and see if I can't make that better.

Also when I switch barrels I find that the first few shots will be high, usually starting about 5 inches high then coming down to a pretty close zero after about 5 shots.

When tightening down the new barrel, screw the Allen bolt in till it is just touching the barrel, then wiggle the barrel a bit as you tighten down further. That will help centre the bolt in the dimple on the barrel
 
Oh, and another thing. If the gas tube is set up so that the holes point down toward the barrel you can expect a buildup of crud on the top of the barrel after a few hundred rounds. I had to soak my .223 barrel well with powder solvent and even then had to carefully scrape some clumps off.

Of course, you can turn the tube so the holes face up, but I'm wondering if the buildup will then happen in a much harder place to reach.
 
The Robinson arems rifle uses a barrel extension similar to what an AR uses, but conveinently it is different.
The nice folks at Robinson Arms will not sell us their proprietary barrel extension, so any barrel we make can not be installed on their rifle.
To make 1 of barrel extensions is just not feasible.
I believe with a truly high quality barrel like a Rock or Lilja these rifles would benefit in accuracy just like we found with the ARs, but with no extensions available I guess we will never know.
Gotta love the companies who won't play nice with others:kickInTheNuts:
 
alberta tactical rifle said:
I believe with a truly high quality barrel like a Rock or Lilja these rifles would benefit in accuracy just like we found with the ARs, but with no extensions available I guess we will never know.

Gotta love the companies who won't play nice with others:kickInTheNuts:
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ATR, sorry, I know very little about this, so I am going to take advantage of your reply to learn something.

If you were making a custom match barrel for, say 17-222 caliber, that is based on .223 (same base diameter, same case rim diameter, etc), could you use the barrel extension from a .223 barrel (assuming that you had .17 barrel blank, etc)?

Oh, and how are barrel extensions usually manufactured?

I guess making a match barrel for a Magpul^WBbushmaster ACR is right out as well, which is what got everyone so upset?
 
notbsd said:
ATR, sorry, I know very little about this, so I am going to take advantage of your reply to learn something.

If you were making a custom match barrel for, say 17-222 caliber, that is based on .223 (same base diameter, same case rim diameter, etc), could you use the barrel extension from a .223 barrel (assuming that you had .17 barrel blank, etc)?

Oh, and how are barrel extensions usually manufactured?

I guess making a match barrel for a Magpul^WBbushmaster ACR is right out as well, which is what got everyone so upset?
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The barrel extensions are typically CNC machined and in most cases are not reusable.
The bolt lugs lock into the extension and are a wear item.
Your 17-222 would use the same extension that any 223/556 barrel on an AR15 would use, so other than possible gas port size issues I can see not problem doing it.
The problem with the XCR rifles is that Robinson altered dimensions from other AR type rifles and to make 1 or 2 is just too much time in programming and fixtures to make it viable.
 
Hi terra,
Can I get a barrel extension for my XCR so ATR can make a sweet fluted stainless steel match barrel for me...Please

We can keep it between us, nobody elsee has to know...
 
as posted in the FAQ thread,

We are almost done engineering the .308. It ended up being a complete redesign from our work from a few years ago. So we're going to spend some time reviewing the 6.5 again. I sent a 6.5 out into the wild last week with a good friend from the olden days. Keep your fingers crossed.

Alex J. Robinson
Manager
Robinson Armament Co
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