627 Crown

[The Highlander]

Hi,
I don't shoot lead, pretty much ever. I did fire my new 627 Pro Series with 8 rounds of 110 grain Winchesters yesterday, and the accuracy was horrible. When I got home I noticed the crown looked terrible.

Is this lead buildup? Or a bad crown job? If lead, what do I use to remove it properly?

Thanks for the help!

 

[andyo5]

Clean the barrel and use a bore brush. You should be able to see five clear lands and five clear grooves.
The lead usually builds up near the base of the barrel, sometimes in the grooves near the end if you shoot alot of lead. But without shooting lead, I say if it is a bad shooter probably a bad crown/barrel, or it just does not like the ammo you were shooting. You might try a heavier bullet such as a 158g hollow point.
S&W will fix the gun for you so long as you did not cause the problem. Sounds like you did not.
I also have a 627 Pro. Here's what my crown looks like:

 

[The Highlander]

I have shot maybe 20 rounds of FMJ .38's through the pistol, then 8 rounds of the Winchester 110 grain lead. Surely, that isn't enough to cause this much of a problem without their being an issue with the crown is there? I fired a couple cylinders of the same lead ammo through an old 686 at the same time and don't see any issues with that gun.

 

[The Highlander]

Oh yeah, used a bore brush after running a patch soaked with Pro Shot Products Lead & Powder solvent through it. No change I can see after scrubbing with the bronze brush.

 

[CScott]

I shoot a lot of 158 gr LSWC through my 627 Pro without ever seeing lead at the crown like that. The crown on mine appears perfect (I happen to have it with me) and the gun is more accurate than I can shoot. Don't give up on yours, they are great guns, IL and all!

 

[The Highlander]

Not giving up on it, this is a Grail Gun for me! Just trying to figure out what is going on with it. The above pic is AFTER scrubbing with lead solvent and a bronze brush. Only fired one cylinder-full through it.

 

[The Highlander]

Just got an email from Smith. They want the gun back for examination.

Wonder if I can have them install a gold bead sight for me while they have it?

 

[bigtubby]

You can order the gold bead front sight and put it on yourself it has the quick change sight system. Did that on mine as well. got mine from SDM fabricating part # GC250 now waiting on a call tag to get the crown recut.

 

[The Highlander]

Got my call tag via email this afternoon. I will check out the part number you gave me. I wasn't aware they were easily changed on these pistols. Keep in mind, I'm mechanically reclined!

Love the pistol, assuming I can get a good crown and have it shoot better than a 12" group at 10 yards.

 

[Roy_G]

You can order the gold bead front sight and put it on yourself it has the quick change sight system. Did that on mine as well. got mine from SDM fabricating part # GC250 now waiting on a call tag to get the crown recut.

I have a similar Smith (686SSR), and am curious to just how easy it is? I would like to add a hi-viz front post. On topic I hope they make this right in a expedient manner. I had to go check mine after reading all the problems people are having!

 

[graydog]

I have a similar Smith (686SSR), and am curious to just how easy it is? I would like to add a hi-viz front post. On topic I hope they make this right in a expedient manner. I had to go check mine after reading all the problems people are having!

On the PC gun it is real easy to change the front sights. There is a bit of a trick to it but once you get the hang of it there is nothing to it. The front sight is spring loaded. You pull it back all the way and then lift the front of it up and it will pop out and Bob's your uncle.

I would have to see a picture of the 686 but most of them that I have seen have a pinned front sight so they are a little more difficult. You have to remove the pin and then the front sight. Get yourself the correct hiViz sight and install it and then drill a hole through it and then put the pin back on.

Graydog

 

[bigtubby]

The front sight on the 627 pro & SSR are spring loaded just firmly pull to the rear of the gun then lift the muzzle end of the front sight up and relax the spring. here is a link to the hi viz http://www.brownells.com/handgun-pa...er-dx-models-overmolded-sights-prod25992.aspx

 

[ptgarcia]

I picked up my 627 Pro this afternoon, and the first thing I did was remove the front sight to see how the interchangeable system operates. Other than the spring being very strong and requiring a bit force to compress (a little difficult with just your fingers) the process is simple. I'm going to try the gold bead for mine.

 

[The Highlander]

Dang, that sounds easy enough for me to try when I get it back from Smith. No need to pay them to do it for me if it is that idiot proof. I'm used to working on Glocks, not revolvers. Did do a spring kit swap on a couple of GP-100's too.

Love my 627 Pro, just hoping they do me right on the horrible crown. If not, I'll just trade it. Honestly, I have a PC L-Comp anyway that is smoother, slightly easier to carry, and about twice the cost!

 

[BLUEDOT37]

627 PC 8-Times re-crown

After being disappointed with my newly purchased 625 PC's crown, & a few of my older revolvers too, I decided to purchase what I needed to re-crown them from Brownell's.

Here's before & after pictures.

.

627-5 PC, barrel crown, before

.

627-5 PC, barrel crown, after

.

Brownells Chamfering Tools

.

Brownells Chamfering Tools

.