Thread: Chamber for 223 running heavies with AICS

I've looked into this quite a bit.
In the US a .169 free bores is very popular for running heavy projectiles, but lots of guys also just use a 223 Wilde reamer.
There are dozens of different reamers you can get and they all seem to work to some degree or another.

If you really want to maximise performance for a certain projectile weight getting them reamed with a throating reaming to a dummy cartridge dimensions is the best way.

Most 55gr bullets are pretty jump tolerant so should work just fine in a longer free bore.