hunting1,

In my experience, both on websites and in stores, IMR4166 has been more available than IMR4064 since it was introduced. Only recently has much 4064 been showing up again.

IMR4166 is also a short-cut powder, so meters far more easily than 4064.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck