New CZ 457 24" 1.180 Match Barrel from L3i

[bobby1028]

Even balances well in an MDT Oryx, which is pretty much the equivalent of a Gen2 ACC...difference being polymer panels and half the price.

 

[Mark_Dorman]

Has been hard to open ever since you have fired the first 100 rounds or does it go away after cleaning and then return?

Goes away after cleaning and comes back every time the round count gets past 100 or so. I don't have a hard number, but it is very obvious once you're past 200 rounds.

 

[pronelife]

Where’s the best place to buy go no go guage set? Is it absolutely necessary to have them when the barrel arrives or is there a way to set up without?

Whidden Gunworks has a cool set here. Seven gauges are included to indicate headspace from .039″ to .045″. Use these to check existing firearms, when installing prefit barrels, or along with Shim Kits to fine-tune headspace to match your ammunition.

 

[Simonsza1]

Got shipping notice today!

 

[ThemBs]

I received my Wasp cut barrel today and put it on a receiver. Man, that bolt close but especially bolt open is stiff even without a round chambered. I'm guessing I'll need to use a barrel shim, has each of you needed to use a shim?

I know I need/should get a good tool to measure so I'm not guessing which shim to use.

 

[Dimefox]

Anyone have this barrel in the KRG Bravo Gen 1?
Any fitment issues?
Thanks in advance

I have a Bravo and had to open it up a bit. See post 172 on this thread. I'll be honest, I don't have the slightest clue what generation it is. FWIW, I bought it new in July 2022.

 

[Stollsc]

What headspace did you end up with and what ammo will you be using?

Does the barrel contact under the picatinny rail right where it meets the receiver? Hard to tell from photo.

Thanks for the measurements and initial review!

My l3i 457 barrel ran into my 419 rail. I moved the rail back just a bit so that the barrel would seat against the action. I emailed L3i and Marcus said they had to move the rail on their test rifle. He said it still functions fine.

 

[Masojoh]

I received my Wasp cut barrel today and put it on a receiver. Man, that bolt close but especially bolt open is stiff even without a round chambered. I'm guessing I'll need to use a barrel shim, has each of you needed to use a shim?

I know I need/should get a good tool to measure so I'm not guessing which shim to use.

Mine would not close without a shim. I would not advise forcing it closed if it feels that way.

If you don’t have a way to measure, it will have to be trial and error. Maybe start with 5 thousandths and see how it feels to close.

 

[Mechdesigner]

All barrels will need a shim, .003 is the most common shim needed.