XCR break-in ?

Czarface

Czarface

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Guys I'm just curious to know what's the purpose of breaking in a the rifle starting the gas setting at 4 for 50 rounds as my manual states... Could anything happen if that step wasn't done but works on lowest setting chucking brass 8-16ft? Thanks Jim
 
Czarface said:
Anybody? Lots of xcr owners out there
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The break in period states run on setting 4 and run the rifle quite "wet". I believe this is to "smooth out" the machining tolerances and create "the perfect fit" if you will.

Think about it. If you run the rifle on the highest gas setting (setting allowing most amount of gas into the gas system, thus slamming the piston back with the most force) this will sear off any unfavourable tolerances from the machining process after the required 50 rounds. The reason they say to run quite wet is to ensure adequate lubrication to compensate for the tight fit and extra heat generated by the friction that may be present due to the slightly larger tolerances that may exist. Once the 50 rounds have been sent down range they figure the fit should be perfect and then tell you to turn the gas setting to the lowest point where you can still launch brass 8-12 feet. I'm running mine on setting 2.

This is just my two cents as they don't really explain why in the manual. But when the designer/manufacturer suggests something, it is usually for a reason. It doesn't take long nor is it difficult. So I'd suggest following it.
 
Mr Wolverine said:
Do not set the gas setting to maximum to start with, that is very bad advice. Set the gas setting to the smallest that the rifle will operate on. On the maximum setting you are simple "hammering" the rifle unnecessarly. This would be like taking a new vehicle and running the rev counter into the red all the time. When running in a new rifle (any new rifle) treat her gently, nurse her, keep her clean and well lubed. When she is run in and all the working parts are honed to a fine finish, then and not until then, you can up the anti if you have to. Keep the larger gas settings for use under adverse conditions, or when you want to have an excess of power to insure reliable operation, like a competition.
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Mr Wolverine said:
You recommend a lower gas setting than the manufactures manual states? I shall try this out this weekend.
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Yes, I have discussed this point with Alex and he agrees with me, the manuals should be updated, but that is not a high priority due to the demand for rifles.
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This is the method I used. Been on gas setting 1 for 800 rounds - 2 stovepipes. Will move to gas setting 2 for what I suspect will be flawless operation from that point on.
 
The manual says to shoot the first 40-50 rounds at setting 4. That will allow the rifle to operate without any failures to feed or stovepipe during breakin. Lube well in the upper. Then to setting 2.
 
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I ran mine on setting #4 for 20 rnds then #3 for 40 rnds and am now running it on #2 without issue. I kept it pretty wet thru settings 3 & 4. Now it's lubed like any other fiream and not to excess like during the break in.

YMMV
 
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