Damn

ii open · January 15 2013 04:05:57 PM MST

I reloaded some 10mm rounds(dummy) using new starline bass and 155gr xtp bullets. Dropped them into my new SL barrel and they don't go all the way down(almost) ${$default_huh_smiley}$ So I tapped the cartridge til it bottomed, and then extracted the round.

This is what I found

Looks like the bullet is touching the step?(I don't know what that part is called) where the case headspaces. Btw, the bullet is seated @ 1.250.

Your thoughts?

sqlbullet · January 15 2013 04:13:07 PM MST

Is the barrel only short chambered? What do factory round do if you drop them in?

Has the barrel been cleaned since you bought it?

ii open · January 15 2013 04:26:51 PM MST

Quote from: sqlbullet on January 15 2013 04:13:07 PM MST
Is the barrel only short chambered? What do factory round do if you drop them in?

Has the barrel been cleaned since you bought it?

Believe it or not, I can't find any 10mm ammo except for DT and I ain't spending $48 for a box. Short chambered? And yes, I cleaned the barrel.

Yondering · January 15 2013 05:32:50 PM MST

I wish the aftermarket barrel makers would quit trying to pawn off this idea on us of overly tight chamber and throat dimensions making their product a "match grade" barrel. It's like they ignore the barrel/slide fit, so they can sell a "drop in" barrel, and think a tight chamber makes up for the loose exterior fit. It sucks, and it's wrong.

ii open, I'd be thinking about sending that barrel back, except that with SL's lead time, you might be out of a barrel for a while. It sucks to have to fix a brand new barrel like that, but that's probably what I'd do.

I've read about this happening enough with Storm Lake barrels that I certainly won't be buying one.

sqlbullet · January 15 2013 05:39:35 PM MST

Ultimately the lead time was why I went with Schuemann for my 1911 project. Of course it might take me 4 months to fit the barrel as slow as I am going, but at least I feel like I am making progress.

Different applications too. My barrel is short chambered. That means it must be finish reamed to whatever .400 caliber cartridge I want to shoot it it. In this case 10mm. Not an issue for me since I have a 10mm reamer, but most dont.

ii open · January 15 2013 07:43:02 PM MST

Quote from: Yondering on January 15 2013 05:32:50 PM MST
I wish the aftermarket barrel makers would quit trying to pawn off this idea on us of overly tight chamber and throat dimensions making their product a "match grade" barrel. It's like they ignore the barrel/slide fit, so they can sell a "drop in" barrel, and think a tight chamber makes up for the loose exterior fit. It sucks, and it's wrong.

ii open, I'd be thinking about sending that barrel back, except that with SL's lead time, you might be out of a barrel for a while. It sucks to have to fix a brand new barrel like that, but that's probably what I'd do.

I've read about this happening enough with Storm Lake barrels that I certainly won't be buying one.

Yeah tell me about it, I waited almost a month for this barrel, and now I gotta return it....

The_Shadow · January 15 2013 08:09:09 PM MST

They didn't finish reaming the chamber and truing cone properly. It looks like there are some marks imprinted on the case mouth where you were driving it into the unfinished chamber area. If you did NOT order this barrel as a Match Barrel to be fitted then...Please advise Storm Lake about this and ask them to send you a RMA shipping tag to have the work done at their expense.

sqlbullet · January 16 2013 09:02:03 AM MST

And tell them you want it fast since you have already spent your time in queue. ${$default_tongue_smiley}$

REDLINE · January 16 2013 11:44:26 AM MST

Might be a little tricky with lighting and all, but would you mind posting a pic of your Storm Lake barrel's chamber if possible?

REDLINE · January 16 2013 02:03:25 PM MST

Following are some pics of my 6.02" Storm Lake barrel chambered in 10mm for my G20. Do you notice any questionable differences in the chamber of yours? All rounds I have (Underwood, Double Tap, Hornady, Winchester, CCI Blazer, among various handloads) drop into it cleanly with no hangups whatsoever.

The_Shadow · January 16 2013 06:53:16 PM MST

REDLINE, Great pictures...There is not much free bore at the end of the chamber in those pictures. Pictures 1 and 4 look like they have a little more taper in the freebore. Picture 2 & 3 look like the rifling starts at the end of the chamber with very little taper.

ii open · January 16 2013 08:43:53 PM MST

Is this good enough? And yes it was very tricky to get this shot LoL. I did not get a chance to try factory loaded ammo yet. But it would suck if I couldn't use reloads, because that was my soul purpose for the barrel...

The_Shadow · January 16 2013 09:43:25 PM MST

With that short freebore taper you will be using a COAL of 1.2450", so trying 1.2500" may prove to be tight!

As you look inside you can see that the lands are still present at the end of the chamber cut, these should be absent and tapered lands to for the truing cone section.

The barrels of the Bren Ten pistol's freebore doesn't have any rifiling for 3/4th of an inch...

REDLINE · January 17 2013 12:17:08 AM MST

Quote from: ii open on January 16 2013 08:43:53 PM MSTIs this good enough?

Yes! TYVM for posting it for comparison. I think The_Shadow is right on in terms of what he's saying in regard to both our pics.

REDLINE · January 17 2013 12:26:55 AM MST

Quote from: The_Shadow on January 16 2013 06:53:16 PM MST
REDLINE, Great pictures...There is not much free bore at the end of the chamber in those pictures. Pictures 1 and 4 look like they have a little more taper in the freebore. Picture 2 & 3 look like the rifling starts at the end of the chamber with very little taper.

Quote from: The_Shadow on January 16 2013 09:43:25 PM MST
With that short freebore taper you will be using a COAL of 1.2450", so trying 1.2500" may prove to be tight!

As you look inside you can see that the lands are still present at the end of the chamber cut, these should be absent and tapered lands to for the truing cone section.

The barrels of the Bren Ten pistol's freebore doesn't have any rifiling for 3/4th of an inch...

I'm with ya in noticing the lack of any notable free bore! It really took me by surprise after taking the first looks at my pics. Not to mention seeing the same with ii open's pic. And now this all has me wondering if we're now noticing the missing link on where barrels are differing in instances where we're not really sure why they do in terms of chamber pressure when it doesn't seem there should be a difference. As in; How well is this tolerance held between barrels of the same manufactuer? AND; How much is it actually differing between different manufacturers?

How does your G29 SLB look by comparison to the posted pics in terms of free bore or lack thereof? I would also have the same question of other's barrels from other manufacturers.