I want the reamer to fix my one Wylde chamber AND run in my suspect chambers. And now that I see the guage, I'm going to need that too.
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I have that reamer, works well in some barrels, one of the few tools of Neds I would buy.
Not reaming my Euro Colts, part of the charm of the rifle, for me.
https://i.imgur.com/llHpSm5.jpeg
So dumb rookie question. I just want to confirm that since these are .223 barrels, not 5.56 barrels, you shouldn't/can't use 5.56 ammo like XM193. Saw some mention that it's like a wylde chambering, so would 5.56 be ok?
Honestly, that's what's kept me from getting one, since I already have a ton of 5.56 ammo, multiple US AR's and don't want to FU, grab this rifle without thinking and start running 5.56 through it.
If the chamber specs are similar to wylde, then you should have no problems at all shooting 5.56 pressure ammo. I had high hopes when CZ purchased Colt, but so far everything they have put out is about as exciting as watching paint dry.
I hope things change in the future.
Someone should double-check this, but I believe CIP chambers are meant to digest 5.56x45 NATO ammo. They certainly do exactly that, in actual use. In the chamber minimum dimensions, a CIP chamber should have even more safety factor than Wylde, with a rather long freebore. The freebore diameter and length are labeled “check for safety reasons” on the drawing, and I doubt that warning gets ignored, with Euros being the way that they are. There are a couple other dimensions so labeled, as well.
The other dimensions seem to fall within the range of other .223 and 5.56 chambers, and I don’t see anything that would make me afraid to test it with 5.56-marked ammo.
While we know that the barrels are marked 223Rem, where are y'all getting the idea that they are chambered to CIP 223Rem specifications and not SAAMI specifications? I wouldn't assume that Colt reamed them to CIP specifications just because they were supposed to be sending the rifles to Europe. I can't imagine that they have both CIP and SAAMI 223Rem chamber reamers. Or, have I completely misunderstood something here?
Even if it was really a .223 chamber, it's not like the gun will blow up. You'd probably have diminished reliability with 5.56 (failure to extract, for example) and possibly popped primers.
I'd love to know for sure what the deal is, AND if the current run is chambered differently than the first 16" version. Mine definitely behaves like a 5.56 chamber. And I surely have some barrels that DO NOT behave.
Bolt Closes on 1.4636, does NOT close on 1.4646.
I’d be surprised if Colt sold these in Europe without a chamber that met CIP standards and proof loads. I think the Euros have pretty strict proofing regs.
The easy way to check this is to use a Hornady modified cartridge kit with a long flat-base bullet like the Speer 70gr seated backwards. When you remove the modified case from the chamber, the length of bullet-ass sticking out of the case is roughly freebore length.