5mm :)
Remington's web site has a model history section. Ammunition hard to find so value not that great. Maybe 100 or so USD
5mM
.17 HMR is a rimfire cartridge. The HMR stands for "Hornady Magnum Rimfire"
5mm is half a cm
25mm2 = 5mm * 5mm
5mm wide
4mm is smaller than 5mm
3-5mm bilateral = -2
5mm 5mm = 0.5cm
The original was in caiber .44 Henry rimfire. Currently in caliber .22 rimfire. Which one?
The duration of Rimfire - film - is 1.05 hours.