AR Comp loads for 6bra?

[MarkO76]

I'm about to load up some DTAC 115gr to play with at 1k yards and am wanting to know how many grains of AR Comp would be a safe range to stay in? I'm using Lapua fireformed brass and CCI 400 primers it's a 26" barrel with a remington 700 action.

 

[urbanrifleman]

Start at 29.5 and work up if you have a freebore that is compatible.

 

[Torge]

In the fall of 2019 I tested 106 grain Hunters in my Defiance 6 BRA, Krieger barrel with Lapua brass, 205M and AR-Comp. 27. 8 to 30.4 grains in .2. I hit pressure signs (swipe marks on head) at 29.0 with bolt lift 29.8 and up.

With 115’s I would start lower than I did above. If you use a moly bullet coating that will change things but for bullets out of the box start lower.

The power charge weights gave me roughly the same velocity as I would get with H4895 and I can go a grain higher with that power before pressure.

 

[urbanrifleman]

29.6 with Berger 108s is mild load in my 104 Freebore. I use that for fireforming.
30.4 grains is the 2940 node.

 

[Torge]

29.6 with Berger 108s is mild load in my 104 Freebore. I use that for fireforming.
30.4 grains is the 2940 node.

Are you coating your bullets or using HBN on them or in you barrel/throat?

 

[urbanrifleman]

Are you coating your bullets or using HBN on them or in you barrel/throat?

Moly but I have shot the same loads dry.

 

[dnellans]

I can’t shoot 29.5 in my bra with 109m’s let alone 115’s. I’d personally start at least a grain lower and work up at .2’s until you see pressure so you know where it is.

 

[rjtfroggy]

The big problem is there is no load info for AR Comp in any of the 4 loading manuels I went through.
After a few PM's with different members the general consenses is to start 1 or 2 gr. low and work up for my load.
I am shooting 30x47 replacing 8208xbr because of none available.

 

[rogina]

Start at 29.5 and work up if you have a freebore that is compatible.

Have you loaded any AR-Comp in a 6X47L with 105 grain bullet?

 

[urbanrifleman]

Have you loaded any AR-Comp in a 6X47L with 105 grain bullet?

I have 6xc. 34.6 grains is 2980 with Berger 108. Very small small spreads and groups.

 

[rjtfroggy]

All right so what is a good starting load for the 6BR. using 105 Berger's.
I have a bunch to load up and may as well start using it with these then move on to the 30x47 in the spring.

 

[urbanrifleman]

All right so what is a good starting load for the 6BR. using 105 Berger's.
I have a bunch to load up and may as well start using it with these then move on to the 30x47 in the spring.

Pretend it is H4895.