I stumbled across a thread dealing last summer with the imperfectly chamfered muzzle of a 627 PC.
Two parties as usually discussed about the inevitability of such occurrences in the industrialized production vs. the good gone times of craftsmanship, but the majority swayed toward the unacceptability of the defect.
I therefore focused my attention on the muzzle of my 627-6 5”, whose some rifling lands do actually protrude past the crown (forcing cone & cylinder look good to me).
Indeed, I even did notice the detail when I bought it, but did not pay the matter much heed.
I would like to know about whether the issue is merely aesthetical or might be relevant on practical grounds.
I don’t get my best groups with the 627, but I’m not used yet to the gun features, namely weight, sights and above all the trigger, so that I definitely can’t blame for sure any gun defect for some inaccuracy.
What’s your opinion, gentlemen?

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It makes no functional difference IMO. I have found the ECM barrels as is to be more accurate than I am.

I'd send the first picture to the mothership to see what they think. I suspect that they'll replace the barrel.

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Foster Positivity.

Thanks. I guess the muzzle could be easily smoothed without changing anything. Just wondering whether this would be worth the trip, waiting and risk of mishandling potentailly causing different inconveniences.

PC guns, like the OP's, are broach cut rifling, not ECM.

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NRA Benefactor Member

My 627 PC was pretty boogered at the muzzle...



It was highly unacceptable for me, I sent it back in, S&W took care of it, I got it back about a month later.

You paid good $$ for that revolver. My opinion? If you're unhappy with it, do like some are saying and contact S&W about it.

It seems as they cut / center everything from the grooves, not the lands and the lands have significant variation in height. Very common these days and I doubt they will replace it. If you follow those lands back to the forcing cone you will find the same variation of depth forward and aft based on the height of the lands. The higher lands with be cut back further and lower less.

Sent from my SM-G920V using Tapatalk

IMO, cleaning up the muzzle/crown can improve it's grouping.

I've chamfered several of my revolvers & my unscientific observation is that some of them grouped consistently better afterwards.

Some had no apparent change.

If done properly it will not have a negative affect.

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627-5 PC, barrel crown, before chamfering

(-03a)

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627-5 PC, barrel crown, after chamfering (before polishing)

(-01a)

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Brownells Chamfering Tools

(-01a)

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Brownells Chamfering Tools

(-02a)

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Waiting for the break of day

My 686 pro series shot patterns not groups, Muzzle crown looked like doo doo. I sent it back, looks better nd now shoots much better.
All the pr series gun I have looked at recently seem to have the same defects. So common that when I called about the CS rep already knew the problem before I finished talking.
We need to send everyone of these guns back Dont reward S&W;s ****** QC by fixing it your self.
Only way Quality is gonna improve is if gun buyers make warranty work more expensive than better QC,
As it stands Smith is just saving money on making ****** guns and then only having to fix a few.

my 627 pro had a ****** crown; I recut it and my groups at 20 yds shrunk in half with the same ammo.

Question About Newly Made 627's

Good morning. I’ve been away from the Forum and my S & W revolvers for a while, but I am still indebted to Sol Invictus for his keen observation about the muzzle crown of my 627, that I had found more difficult to shoot than any other revolvers in the same caliber I have owned or tried.
After trying to convince myself that any defects were due to an optical effect, or anyway of merely cosmetic relevance, and that inaccuracy might be due only to my inadequate abilities, I kept watching in the light of Sol Invictus’ input, who was absolutely right.
Being unable to find just one spotless revolver out of all those I had had so far, I felt angry and not like dealing with any S & W for a long time.
Meanwhile, a dealer who did not sell me the gun confirmed the boogered muzzle crown and differences in land height/groove depth and kindly took care of sending it back.
I must declare that I had to escalate quite a lot and long, while having fun with totally different guns that made me not missing the 627, but finally got appropriate attention and received a brand-new gun.
Once more, it’s a real pity that some degree of carelessness prevent such otherwise beautiful guns from being spotless, as documented by the state of the front sight out of the box.
But yes, that’s merely cosmetic and everything else is OK, with ideal B/C gap and headspace, perfect timing, nice rifling and muzzle, mellow trigger and… groups in line with my standard, making also the 627 more accurate than I can shoot.
Overall, I still like more the lighter 327 counterpart , but it’s obviously a matter of individual preference or even daily mood.
So at the bottom line: are there different handguns better built and looking and overall more rewarding? Undoubtedly yes! Are such handguns worth the higher price they call? I dunno.. Does somebody shoot better them? Likely yes, but (at least presently..) not me…
Best

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The muzzle crown does affect the accuracy of the barrel....
I had a bad shooting 627 and gave it a twist of a 45° muzzle crown cutter. My problem was solved. Ofcourse I had to learn from the 929.....