Cycling 58g bullets

[riggeek]

Which receiver extension are you using, carbine or rifle?

And which buffer are you using?

The reason I ask is I might have the fix for you, I went through the same issue with an Odin +2 barrel.
I would try not to drill the gas port larger, if you have a problem with the barrel and try to warranty it drilling it will void the warranty.

I have tried all 3 types of lowers, with a valtor A5 with a H0 working the best. All of these lower function with no issues on my other 2 rifles running 556.