I was gave one of these and it was a tack driver , I gave it to a young boy in a family that did not have a lot of money , and he has thinned out the squirrels with it.

I have a 550-1. According to the dating code on the barrel. It was made in Nov. of 1956. I've had a scope on it from time to time. At 50 yards. The holes will touch or very close. At 75 yards They will drop about a 2.5". Open up to about 1.5" I have several 22 rifles. Only my browning SR 22 Can get close to the 550-1's group at 50 yards. Very accurate rifle to be close to 70 years old. It also never jams, No FTF, or FTE. Naturally, there is a dud or severely underpowered round now and then. Not the guns fault. If the round fires it will 100% eject the casing, chamber the next round! The only drawn back to the 550-1. Is the floating chamber gets dirty quickly. I have found a way to partially disassembled it. Remove it from the barrel. So underneath it can be cleaned and oil. Maybe every 400-500 rounds. Awesome rifle!!

I have one.  What a fantastic gun. So versatile. Accurate, great for small game. If you use shorts it quiet enough not to scare other game off.

I always close my eyes tightly before I fire any gun .

The rifle with a floating chamber

Awesome review

Date code is on barrel near the receiver 2 letters and a number most likely. First letter is month second is year. Mine is december 1961, same as my birth year ...
A quick google " dating remington 550-1" will pop up the chart.

And as far as I know this is the only 22 rifle I have ever seen shoot any 22 bullet made automatic,,shorts then a long then a long rifle and it will shoot them all.

I have a 1955 Remington 550-1 that I am restoring with new parts that I have acquired and I want to know how to remove the action spring guide from the receiver plug. I am also getting a few failure to eject rounds and half the rounds that do eject are pinched at the open end of the spent casing. What parts need replacing to fix these issues.

Mr obvious tell him to properly clean this rifle you take the chamber out ,,it floats ,,,,ha ha hard to understand but it works and is not attached to the gun.