Thread: Very hard extraction.

Goorie looking shoulders shouldn't cause extraction problems - the case can virtually fall away from the shoulder.

Just out of interest GM will a projectile fit into the neck of one of your fired cases?

Originally Posted by zimmer

Goorie looking shoulders shouldn't cause extraction problems - the case can virtually fall away from the shoulder.

Just out of interest GM will a projectile fit into the neck of one of your fired cases?

I can get a projectile into a case from my Zastava 7mm RM but not in one from the Browning 7mm RM. OD of the necks from the Zastava are 8.10mm and from the 8.06mm.

The photo below shows the brass from the Zastava at the top and the Browning at the bottom. Both loaded from clean new Norma brass. The stuff once it finally gets beaten out of the Browning is very dirty on the neck. I have heard that there were a number of these Brownings that has tight chamberings. The loaded rounds chamber and extract fine without firing.



The marks on the brass are really pretty minor and very hard to photograph.

My moneys on primary a extraction issue

Originally Posted by gadgetman

I can get a projectile into a case from my Zastava 7mm RM but not in one from the Browning 7mm RM. OD of the necks from the Zastava are 8.10mm and from the 8.06mm.

The photo below shows the brass from the Zastava at the top and the Browning at the bottom. Both loaded from clean new Norma brass. The stuff once it finally gets beaten out of the Browning is very dirty on the neck. I have heard that there were a number of these Brownings that has tight chamberings. The loaded rounds chamber and extract fine without firing.



The marks on the brass are really pretty minor and very hard to photograph.

Most likely my eyes but there looks to be a shit ton of runout on the bottom cartridge?
Is there any feel difference when chambering.

I reckon primary extraction could be the issue as well. Is it a light load?

Sent from my SM-G935F using Tapatalk

Originally Posted by R93

Most likely my eyes but there looks to be a shit ton of runout on the bottom cartridge?
Is there any feel difference when chambering.

I reckon primary extraction could be the issue as well. Is it a light load?

Sent from my SM-G935F using Tapatalk

Just an optical illusion on run-out due to poor lighting and angle.

Will knock up a shim to place between the bolt and receiver and see how it behaves as a test. Think the chamber needs a good scrub too.

Load is 71.5 gr of 2217 pushing 162 gr A-Max out of brand spanking Norma brass and CCI magnum primers. Zero signs of over pressure.