New .308 sub/super round 7.62 covert

[Titleiiredneck]

http://1050fps.com/viewtopic.php?f=18&t=27


2650fps with 125 pills out of 16" ar platform, 2350fps with same but 10.5" barrel.:grin:

[Titleiiredneck]

http://i830.photobucket.com/albums/zz229/alleycat72_bucket/308Covert001-1.jpg

[Rover31]

Yep been running the 7.62x39 (.308 bore) in an encore and a bolt gun for over a year now. Good for you for putting out there. Don't know why more people have not looked at this round.

[Titleiiredneck]

Yep been running the 7.62x39 (.308 bore) in an encore and a bolt gun for over a year now. Good for you for putting out there. Don't know why more people have not looked at this round.

It's more grendel sicne the case is blown almost straight to give more case capacity fyi.

[Spook]

I'd be curious how the load data compares :smile: and how long a barrel your bolt gun is running, and whether you're shooting any high velocity?

[Rover31]

Well it has been since last summer when I was shooting the 14 inch Encore barrel. If I remember correctly I ran 150g bullets at 6.5g of Tboss. The bolt gun I have been playing with is a 16.5 inch barrel. That gun I started running 180g RN (shorter bullet better for the can). I am running 7.5-8g of Tboss. The 180 really has a lots of energy behind it still. I plan on testing it on coyotes in a low pop. area (local orchards).
I have used the Red Dot and it was a bit to fast of a powder for me. It really seemed to generate to much to fast and loosen primer pockets. It is also very temp sensitive. I shoot year round and don't like to have to vary my load much. Temps go from 20-90f here.
I am going to start working on a 110g super bullet load and a 150g load maybe both super and sub.
T

[Rover31]

It's more grendel sicne the case is blown almost straight to give more case capacity fyi.

noticed that, bet it feeds better also.

[Spook]

I'm surprised tboss works...didnt think the volume was there..is it compressed?
This is going to make some bolt action guys happy.

[snipecatcher]

I've posted this in another thread, but Trailboss works fine even in the Whisper/BLK as long as you are using short light bullets that don't go beyond the neck area of the case. Based on the loads I've tried in the BLK and this new case having more capacity, I think you would probably be ok with 180 flat base bullets and TB, if you could seat them out a ways. It's worth a try. Sierra 150 pro-hunters (for the 30/30) should be great with TB in your new cartridge.
Regards,
-Dan

EDIT: Guys, I've got a fair amount of the Sierra 150 PH's. If you would like me to send you 20 or so to test with Trailboss in the 7.62 Covert, let me know.

[Rover31]

I would take you up on those. Love to give tham a try.
T
pm me if your serious!

[Rover31]

I'm surprised tboss works...didnt think the volume was there..is it compressed?
This is going to make some bolt action guys happy.
No it is not compressed my loads are fairly "long" bullets is not seated but just to the crimping marks.
happy? yeah very happy!
T

[Greywuuf]

Any thoughts or plans for a .358 Version of this ? I seem to have a spare 10" 358 Ar barrel and dont know what to do with it.

[Spook]

Any thoughts or plans for a .358 Version of this ? I seem to have a spare 10" 358 Ar barrel and dont know what to do with it.

We've ordered the 338 version's reamer...and thinking 375.
Kurtz here on the board did a 358 very close to what this is, you might want to pm him.

[jasonusvi]

Any updates? Thinking 6.5G getting SAAMI may increase support and availability of inputs (bolts, brass, mags). Could 300BLK chambers be reamed to 7.62 Covert?