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There has been concern expressed over the ability of John's barrels to properly chamber 8mm surplus Yugo. We all know that John's work is second to none and I was having difficulty understanding the problem.
I have two new barrels from John that I got about 6 months ago and several ammunitionstore barrels. In an effort to understand for myself what the issue is I pulled some Yugo and Turk 8mm ammo and checked the chambers in both of John's barrels VS an ammunitionstore barrel with about 2k rounds thru it. I firmly seated the rounds in each chamber and measured the cartridge protrusion out the rear of the chamber.
Here's the results:
Yugo
John - 0.130
Ammostore - 0.138
Turk
John - 0.124
Ammostore - 0.131
I pulled the ammo and rotated it and reinserted it to make sure of accuracy in my sampling and it was consistent.
Both of John's barrels measured exactly the same protrusion which is testimony to his accuracy.
According to these measurements, John's barrels have MORE chamber depth than the ammunitionstore barrel after 2k rounds...John's barrels should run the 8mm Yugo. I see no need to do anything to these two barrels. If my gun won't feed using his barrels then it will be my problem in how I'm headspacing it.
Anyone having his barrels is welcome to post their measurements to compare them to mine.
As for me, I'm going to comfortably shoot the snot out of them.
I have two new barrels from John that I got about 6 months ago and several ammunitionstore barrels. In an effort to understand for myself what the issue is I pulled some Yugo and Turk 8mm ammo and checked the chambers in both of John's barrels VS an ammunitionstore barrel with about 2k rounds thru it. I firmly seated the rounds in each chamber and measured the cartridge protrusion out the rear of the chamber.
Here's the results:
Yugo
John - 0.130
Ammostore - 0.138
Turk
John - 0.124
Ammostore - 0.131
I pulled the ammo and rotated it and reinserted it to make sure of accuracy in my sampling and it was consistent.
Both of John's barrels measured exactly the same protrusion which is testimony to his accuracy.
According to these measurements, John's barrels have MORE chamber depth than the ammunitionstore barrel after 2k rounds...John's barrels should run the 8mm Yugo. I see no need to do anything to these two barrels. If my gun won't feed using his barrels then it will be my problem in how I'm headspacing it.
Anyone having his barrels is welcome to post their measurements to compare them to mine.
As for me, I'm going to comfortably shoot the snot out of them.