That is one of the bonuses to owning the Ruger, if I can't find ammo, I'll just put an lr barrel on it.
The nice thing about shooting the 17mach2 over the 17HMR, is that you can save the price of a barrel very quickly. I have already saved about $700, and by the time that I run out of 17mach2 ammunition, I will have saved close to $3000. I can rebarrel my rifle to 22lr, and still be well over $2000 ahead.