.223 Rem - Heavies - RS Powder

[henryo]

Still playing with the 223 and had some good results the other day so I'd thought I'd share.

 

Background info:

I am shooting these in a strong target action rifle with a long throat to accomodate these bullets.

Water capacity is 30.84gr and the barrel is a 30" long 7" twist with around 1800 rounds fired.

I am using Lapua brass, CCI 450 primers and moly coated bullets.

 

Berger 80gr VLD Moly

Reload Swiss RS52 Powder

COAL to lands is 2.544" (CBTO 2.045")

Then loaded 20 thou into lands

Accuracy at 26.7gr - 3075fps

5 Shot group at 200 yards printing just sub 0.5 MOA

QL says 58.9kpsi with BA adjusted to 0.5370

 

Berger 90gr VLD Moly

Reload Swiss RS60 Powder (Reloader 17)

COAL to lands is 2.657" (CBTO 2.067")

Then loaded 20 thou into lands

Accuracy at 28.2gr - 2924fps

Again 5 Shot group at 200 yards printing just sub 0.5 MOA

QL says 52.5kpsi with BA adjusted to 0.4420

 

The RS52 seems perfect for the heavies in this cartridge and gives an optimal case fill. I also went up to 27.5gr where things started to get hairy (3175fps).

The RS60 is borderline too slow - I could only just get enough in the case to make it work with the 90gr and the pressure is still fairly modest. Would not reccomend with anything other than the 90s.

I did try some other bullets - 80gr A-Max and 82gr Berger with RS52 but got bigger groups. I think this barrel is starting to get a bit funny about what it will and won't shoot.

[jay666d]

Some great info there. My rifle is chambered in .223 Wylde and has a 27.5" barrel with a 1in7 twist.

 

I'm using 23.3Gr H4895, over CCI 400 primers... I definatly need to upgrade to CCI 450's! I sometimes wonder if there's another powder I should be using!?

 

But you can't sample them all...

 

Still, I'm getting some decent results. (0.3MOA or better sometimes at 100 yards)

 

Jay