Heavy bullet loads for the 223

[CZ223]

OK, here is the deal. I have to qualify at 600 in 2 weeks in order to be able to use the range on my own. If I don't qualify then, I won't have another opportunity till spring. Without going into great detail, the powers that be have decided,"No bullets of 55 grains or less in the 223". When I mentioned using the 22-250, 220 Swift or my 204 Rugers to qualify, none of which will shoot anything heavier than a 55 grain bullet, it was clear that the guy teaching the class had no idea if I was going to run into problems. So, I need to throw some heavy loads together in a hurry. For this purpose I have some Sierra 69 gr MKs and some 68 gr Hornadys and, as it turns out, some 60 grain Nosler BTs. I have on hand TAC, H335, BLC-2 and H322. If you guys have loads for these that will help it will be much appreciated.

 

[chino1969]

What is your rate of twist in the above calibers?

Chino69

 

[CZ223]

I have three 223's with 1 in 9 twist barrels.

 

[janderson0]

Try here

Hodgdon Data

And here:

6mmbr 223 data

Jim

 

[JCummings]

Your 1:9 twist will certainly stabilize the Sierra 69 Matchkings.
I have found Varget to be one of the best powders for this bullet. Hodgdon give a max load of 26.0 grains yielding 3010 fps. I my AR I usually use 25.5 gr and get 2950 out of a 20 inch barrel.
This is not the best bullet for 600 yards but it will work. You just have to fight the wind more.

 

[people]

I also use varget. I have also used TAC powder.