I've definitively noticed an increase in the cost of ammunition over the last several months. Last year I bought a ton of 9mm and 22 LR, a little bit of 5.56. Paid around $205 delivered to my door per case of 9mm, and under $400 for a case of 5.56. Now basic FMJ 9mm is around $250/case and the 5.56 is around $450. Checked 12 gauge ammo as well, up about 30cpr.
Moral of the story: stack it deep and stack it cheap! Applies to precious metals, ammo, and of course bitcoin as well.