Thread: Projectiles for a .223 with a 12 inch twist.

According to Applied ballistics the 53gr vmax (3300fps) will go transonic at about 600m. The 64gr Berger varmint (3100fps) is slightly better at 650m approx, this means that accuracy at the 1000m/yd line will probably be rather poor.
Most of the typical 50-60gr projectiles won't even make 600 so careful selection will be important to get any performance here.

If as I suspect you just want to get out and have some fun shooting then I'd first look for some of the above projectiles and then try and get a good load made for them. In reality though you'll probably just have to take whatever match type projectiles you can get and go and enjoy shooting. However if you want to be competitive you're going to need a new barrel (or rifle) with a twist suitable for the 75gr plus high bc projectiles.

Greetings @Dan.22-250,
You suspect right. For some time now I have participated rather than competed in shoots as my scores demonstrate. I was aware of the problems from projectiles going transonic and was only going to use the 12" twist .223 at 300 as it was ready to go.
Regards Grandpamac.