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Congruents on your new MCX!!
As you probably know, rifle break-in procedures vary greatly - from a lot of bore cleaning during the 1st 50 or 80 rounds, to shooting it like a zombie invasion was underway!!
Personally, I do a lot of cleaning on my bolt long guns, and less on my ARs. IMO, it's important to do a good initial inspection, cleaning and lube before going to the range. Also to not run your rifle too hot early on.
I pay particular attention to how smooth the cleaning rod feels running down to bore on that 1st cleaning, and how many patches it takes to get to a light gray/relatively clean patch. This will tell you how polished the bore is from the factory.
My indoor range has never had a problem with my cleaning rod, brush & patches out on the bench.
On my ARs, I'll stop after 5 round or so just to let her cool down, and do a bore cleaning at 10 rounds. Run a bore brush with solvent 10 passes, and see how many patches it takes to get to that light gray patch. If it's 15+ patches, I'll suggest another cleaning at 20 rounds, and again see how many patches it takes to get to a light gray patch.
I'd adjust the round count between cleanings by how quickly the patches become clean. You want to get to a reasonably clean patch in 6 or 8 patches. Then you know your bore is in pretty good shape.
AR barrels have muzzle devices and are difficult to actually see their bore, but here's a pic of a 300WM barrel at 70 rounds that has just reached 'copper equilibrium'. That's precision shooter's speak for a broken-in bore...
Oh, and since this is an MCX, you'll also want to keep an eye on the upper receiver's internal cam path - looking for any excessive gouging around the steel insert.
Yeah, we've seen problems there with these new carriage assemblies. Many of us have installed a roller cam pin from POF to avoid that issue.
Cheers
As you probably know, rifle break-in procedures vary greatly - from a lot of bore cleaning during the 1st 50 or 80 rounds, to shooting it like a zombie invasion was underway!!
Personally, I do a lot of cleaning on my bolt long guns, and less on my ARs. IMO, it's important to do a good initial inspection, cleaning and lube before going to the range. Also to not run your rifle too hot early on.
I pay particular attention to how smooth the cleaning rod feels running down to bore on that 1st cleaning, and how many patches it takes to get to a light gray/relatively clean patch. This will tell you how polished the bore is from the factory.
My indoor range has never had a problem with my cleaning rod, brush & patches out on the bench.
On my ARs, I'll stop after 5 round or so just to let her cool down, and do a bore cleaning at 10 rounds. Run a bore brush with solvent 10 passes, and see how many patches it takes to get to that light gray patch. If it's 15+ patches, I'll suggest another cleaning at 20 rounds, and again see how many patches it takes to get to a light gray patch.
I'd adjust the round count between cleanings by how quickly the patches become clean. You want to get to a reasonably clean patch in 6 or 8 patches. Then you know your bore is in pretty good shape.
AR barrels have muzzle devices and are difficult to actually see their bore, but here's a pic of a 300WM barrel at 70 rounds that has just reached 'copper equilibrium'. That's precision shooter's speak for a broken-in bore...
Oh, and since this is an MCX, you'll also want to keep an eye on the upper receiver's internal cam path - looking for any excessive gouging around the steel insert.
Yeah, we've seen problems there with these new carriage assemblies. Many of us have installed a roller cam pin from POF to avoid that issue.
Cheers
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