Reloading and Glock KKM .40 barrel

[WhiteyMacD]

Ok, so .40 reloads wont fit into the chamber of a .40 KKM glock barrel. Is this just an issue with lead, or will a plated bullet suffer the same problem? If its all reloads, I guess I need to send the barrel back to KKM and have them open it up a little.

This is once fired, but the GB has been removed by a full pass through die.

 

[Rod Snell]

Couple of possibillities: seated too long or oversize bullet.
The KKm barrels are not noted for tight chambers like some others.

Quick and accurate way to check is to put the cartridge into a drop-in cartridge gauge. Should have one for each caliber you are going to reload, anyway.
http://www.midwayusa.com/Search/#cartridge gauge____-_1-2-4_8-16

 

[tyromeo55]

By any chance... Did you use a LEE factory crimp die?

 

[WhiteyMacD]

By any chance... Did you use a LEE factory crimp die?

Nope. G-Rx full pass through on a single stage press, then loaded with dillon carbides.

Been reading online, and it says that the KKM .40 barrel is very tight and often need reaming to allow for reloaded ammo. :/

The bullet I was using is a 180gr j&k. I assume these are .401" which should be no different than a jacketed, however I still see that "coke bottle" effect like you see with 147 9mm lead.

 

[tyromeo55]

Nope. G-Rx full pass through on a single stage press, then loaded with dillon carbides.

Been reading online, and it says that the KKM .40 barrel is very tight and often need reaming to allow for reloaded ammo. :/

The bullet I was using is a 180gr j&k. I assume these are .401" which should be no different than a jacketed, however I still see that "coke bottle" effect like you see with 147 9mm lead.

Sounds like you got it covered. I'd assume the barrel too. prolly wont fix the issue but might try the factory crimp die if you have one available to you. If it won't go in after that I'd be sending the barrel out.

 

[WhiteyMacD]

Just got a reply from KKM. (damn theyre fast)

They say:

Any brass that has been used in a FACTORY GLOCK BARREL can not be used. It can not be sized at the base to fit a standard chamber. A FL sizing dies does not resize the base

So, Im going to find some brass thats been through the KKM and reload to recheck. If it still doesnt work, Im going to send it back for reaming.

Thanks for the feedback, guys.

 

[Fyrtwuck]

I'm not buying that "if it's been used in a Glock it can not be sized at the base" stuff.

Thats the purpose of the G-RX die. It's supposed to eliminate that problem.

Get a case size gauge and check your rounds. If they fit the gauge, they should fit the chamber.

 

[Mike B]

Not sure what the G-RX die is,but i use the EGW U die from Lee.
It takes the bulge out of glock brass.I've loaded alot of glock brass
never had one not chamber check.I also use a Redding competition
seating die.

 

[WhiteyMacD]

Not sure what the G-RX die is,but i use the EGW U die from Lee.
It takes the bulge out of glock brass.I've loaded alot of glock brass
never had one not chamber check.I also use a Redding competition
seating die.

Are you using a KKM barrel? The rounds chamber check correctly in a Glock factory barrel. G-Rx is a full pass through die specifically made to remove the glock bulge.

 

[Buzzdraw]

I'm running a KKM barrel in my Glock 35. Never a problem with any of my reloads running. Some of my brass has certainly been fired in a stock Glock chamber. I use Dillon dies on a Dillon 550B. I do not use any special dies, because I haven't needed to.

My KKM is a drop-in spec barrel; any chance the one you have a gunsmith fit one?