Supersonic accuracy load AW Covert 1-9 Twist ?

[Gee]

Hi,

Re:- Accuracy International AW 308 Covert 1-9 Twist 16 inch barrel Integral Suppressor

Some of you on this forum must either have this rifle in this configuration or know someone who does ?

I would just like to find a really good supersonic accuracy load ? Subsonic, no problem. But supersonic I finding best 1 inch groups at 50 yards in testing with 200gr Sierra SMK, pretty disappointing. I am concerned the rifle in this configuation is not going to provide greatly satisfying supersonic accuracy.

Gee

 

[Lowlight]

Re: Supersonic accuracy load AW Covert 1-9 Twist ?

Just try a 175gr load...

I shot this last week with a Covert, using factory 175gr ammo

Same thing the shooter claimed questionable accuracy with supersonic ammo.

The problem was getting it hot, you can't "shoot" the covert like that, not its mission.

A Covert is a speciality rifle, not a target rifle. If you want target style accuracy, change the barrel. Or shoot less rounds... that should included the fictional "cold bore" so here we had a rifle stacking them into sub MOA groups at 100 yards. After about 20 rounds, they begin to open up because of the suppressor.

 

[Gee]

Re: Supersonic accuracy load AW Covert 1-9 Twist ?

Hi Lowlight,

So, your group in the picture is a full power supersonic load at 100 yards ? Thats great. As luck would have it, I have Sierra heads in 308 SMK at 135gr, 150gr, 168gr, 200gr, 220gr and 240gr. The 175gr SMK I don't have, but that was to be my next choice. It's a shame the 168gr nor the 200gr SMK does not work so well in this barrel supersonic as I have a whole bunch.

I was pleased to made a 3 shot 1 inch group subsonic with 10.5 gr Trail Boss at 159 yards. Zero wind. Using 200 gr SMK.

I've just made a post in the gunsmithing section, on this rifle, perhaps you would like to take a look and comment ? Its about rebating 338 Lapua to fit a 308 bolt face.

Gee

 

[fastford]

Re: Supersonic accuracy load AW Covert 1-9 Twist ?

My experience is te same as ll's it shoots lights out if you dont get it hot.