Overpressure Issues .308

[arkansashntr]

I am having over pressure signs with my 5R .308 with an 18" barrel using a YHM Phantom Ti Suppressor. I'm using Winchester brass and 168 gr Amax loaded with 43.5 Varget. I have backed all the way down to the lowest powder charge in my hornady book and still get pressure signs with 32.6 grs of Varget.


I am thinking the brass is the reason unless you all think it could be something else? Just for grins i bought some factory winchester 150 gr power points and still got the pressure signs.

Any help would be appreciated. Thank you

 

[padom]

Did you build the rifle? If so please list your parts. What pressure signs are you getting?

 

[maggitas]

what pressure signs are you getting? If you are getting it from factory ammo then you may want to have a smith check the chamber. Can you post some pics of the pressure issues you are having?

 

[arkansashntr]

Sorry rifle is a 700 5r Milspec. Barrel was 24" had a gunsmith cut and thread barrel to 18". Issue is extruding primer. I will post a picture when I get home.

 

[MAGUA]

Did you shoot it without the can ?

 

[newguy2k3v2]

Remingtons are pretty known for showing primer cratering. You can't use that as your only indicator. My spare cratered everything I put in it. The edges were still round though and not at all flattened.

 

[arkansashntr]

Top to bottom grains of varget. All primers showed the same signs. I'm wondering if it's just my gun and not an overpressure issue.
32.6
35
38
40
43.5

 

[spife7980]

Tough for me to see any detail but the one thing I can see if the primer cratering and that’s about what mine look like out of an unbushed bolt. If the edges of the primers are still rounded and I f you don’t see any round marks from the ejector then I would say it’s a false sign and due to the chamfer and generous space around the firing pin.

 

[918v]

Those are not pressure signs. Look at your firing pin hole. The primer is going to flow and confirm into that dish like lead flows into a mold. Pressure gonna show itself as ejector marks and or heavy bolt lift with sticky extraction. I load 46grs of Varget in that brass under that bullet.

 

[ahhshoot]

Lots of Remington's do that. It's not an over-pressure indicator. IME, for most scenarios, if you are getting ejector marks then you are at max.