Thread: Is the .223 the most versatile cartridge?

Originally Posted by Marty Henry

H&K also did an inertia lock one the model 300 I know someone with one beautiful piece of engineering and friggin accurate even has a nice trigger.

So .22 WMR is powerful enough to work an inertia locked bolt. Perhaps less likely to foul up than a gas operated rimfire rifle, but it would be a close call how heavy accessories to mount on a .22WMR inertia semi.