40 sw resizing issue

[robchar]

I have been reloading for many years but just started to reload 40 sw. I use a Dillon 550b with new Dillon dies etc. Brass is used and mixed. All dies have be adjusted per spec. When I use a Wilson chamber check gauge I notice about one in 20 brass does not go all the way into the Wilson . Seem like the brass is slightly larger just at the base. I then used the barrel of my CZ tactical sport and all the rounds dropped in and out freely of it's chamber. Any thoughts on what is happening. Rounds function well at the range.
Rob C

 

[carsmovies]

Obviously your Wilson chamber check is tighter than your guns actual chamber so I wouldn't worry about it. Unless you are able to resize all your brass before reloading it this will happen occasionally. So long as it fits the guns chamber you're going to fire it from your Ok.

 

[ted_dent]

If you're using range pickup brass some of it is bound to have been fired from Glocks. Ammo fired from factory Glock barrels will often have a slight bulge where the case is not fully supported in the chamber. This could cause the odd case to not fully drop into the Wilson gauge. As long as the rounds are chambering in your gun you probably have nothing to worry about. If it really bothers you buy a Lee Bulge Buster and Lee 40 S&W Factory Crimp Die. Using these you fully push the sized cases through the crimp die and remove any trace of case bulge and they should drop into the case gauge. As I said, however, if they're chambering in the gun with no problem you'd probably be wasting your time. It might only be an issue if you get another gun with a tighter chamber.

 

[RePete]

I have been reloading for many years but just started to reload 40 sw. I use a Dillon 550b with new Dillon dies etc. Brass is used and mixed. All dies have be adjusted per spec. When I use a Wilson chamber check gauge I notice about one in 20 brass does not go all the way into the Wilson . Seem like the brass is slightly larger just at the base. I then used the barrel of my CZ tactical sport and all the rounds dropped in and out freely of it's chamber. Any thoughts on what is happening. Rounds function well at the range.
Rob C

The best chamber checker is your barrel.

I run my brass the a CasePro100.

 

[Shooter ----/]

If you're using range pickup brass some of it is bound to have been fired from Glocks. Ammo fired from factory Glock barrels will often have a slight bulge where the case is not fully supported in the chamber. This could cause the odd case to not fully drop into the Wilson gauge. As long as the rounds are chambering in your gun you probably have nothing to worry about. If it really bothers you buy a Lee Bulge Buster and Lee 40 S&W Factory Crimp Die. Using these you fully push the sized cases through the crimp die and remove any trace of case bulge and they should drop into the case gauge. As I said, however, if they're chambering in the gun with no problem you'd probably be wasting your time. It might only be an issue if you get another gun with a tighter chamber.

Nailed it.

 

[bigedp51]

I have been reloading for many years but just started to reload 40 sw. I use a Dillon 550b with new Dillon dies etc. Brass is used and mixed. All dies have be adjusted per spec. When I use a Wilson chamber check gauge I notice about one in 20 brass does not go all the way into the Wilson . Seem like the brass is slightly larger just at the base. I then used the barrel of my CZ tactical sport and all the rounds dropped in and out freely of it's chamber. Any thoughts on what is happening. Rounds function well at the range.
Rob C

What you describe can happen to pistol and rifle cartridges, your first check should be to turn the case upside down and see if it fits in the gauge. Its very easy for the rim of the case to have a ding or dent in the rim.

The .223/5.56 case below has a ding in the case rim after being fired in a AR15 rifle and doesn't fit into the gauge. This is where a small fine file comes into play for ding/dent removal.

At the other end of the spectrum you can buy new cases and drop one in your gauge and then say WTF.

I resize my cases and then drop them in my gauges "BEFORE" they are loaded to save from having any surprises. Your gauge tells you that your reloads will fit in any chamber of that caliber, and as stated above the only gauge that matters is your barrels chamber. (unless your rich and famous and have a few firearms of the same caliber and then you use the gauge)

Between my sons and I we have the same calibers and only dad reloads so I have to check everything or get scorned and chastised for bad reloads.

And a half blind man can see "Glock bulge" and this was a very early problem that was fixed years ago with new barrels and better brass and the only time I see it is in online photos.

The only "Glock bulge" problem I have is the bulge in the target backboard after I'm done shooting.

 

[Branwilder]

I use a Lee bulge buster on all of my .40 brass... works great.