View Full Version : help with a cartridge ?

May 19, 2011, 08:06 PM
My father had a rifle in the 1980,s that fired a rim fire cartridge that looks a lot like the 17 hmr. Just a little bigger . When my dad passed away in some of his stuff I found 2 rounds he had left for this gun that god only knows wear is at now . I think it is a 20 caliber bullet ( .202 ) on my calipers , it is 1 3/8 over all and has a (U) with a dot in middle stamped on the base . Anyone know what this was called , who made the gun ?

May 19, 2011, 08:08 PM
5mm Remington Rimfire :)

May 19, 2011, 08:51 PM
Thank you . You seemed sure you knew this but I goggled it anyway and you are dead on ! I remember when he had it I only got to shoot it 1 time because he said the ammo was real hard to find . This would make sense being they stopped making it in 1982 !! thanks agin

May 20, 2011, 04:09 AM
5mm RM ammo is being made again:


May 20, 2011, 07:28 AM
Up until they started making it again, finding stashes of 5mm was very expensive. I'd seen them go for more than $100/box.

When Remington abandoned the 5mm rimfire, lots of rifle owners were left holding the bag. Some enterprising machinist found a way to convert them to centerfire (that could be reloaded). This was known as the 5mm Craig.