550-1 firing pin depth?
Have a 550-1 that snaps and just barely marks the shell.
The firing pin protrousion (extended length beyond) is .035 beyond the end of the bolt.
Does anyone know what the max protrusion of the firing pin beyond the end of the bolt should be?
It appears the way the firing pin is made that it could be easily drifted forward in it's retainer using a small drift punch. (Looks to be pressed into it's retainer)
Anyone have any ideas. I put the bolt assembly into another 550-1 gun and it also snaps in the other gun.
The firing pin protrousion (extended length beyond) is .035 beyond the end of the bolt.
Does anyone know what the max protrusion of the firing pin beyond the end of the bolt should be?
It appears the way the firing pin is made that it could be easily drifted forward in it's retainer using a small drift punch. (Looks to be pressed into it's retainer)
Anyone have any ideas. I put the bolt assembly into another 550-1 gun and it also snaps in the other gun.
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Cleaning the bolt is sometime a good way to get the pin to function right.
Emmett0 -
Be very careful on any work around the chamber of a rimfire. If the firing pin is too long it will dimple the chamber the first time you accidently pull the trigger with no shell in the chamber, I was going to say check that the chamber is clean and striker spring . But if the trouble follows the bolt in two different rifles it does sound like the bolt or parts attached to it are the cause of the trouble. Have you taken bolt abd really cleaned all parts that even
contact the bolt.When troubleshooting fire-arms DO NO HARM dont modify an original part unless you KNOW you can buy a replacement.0 -
http://www.gunpartscorp.com/Manufacturers/Remington-33454/Rifles-37895/550-1-39530.htm?results=All
The firing pin #26 is labeled as may require fitting. Is the spring good and the chamber wall providing good support? Sometimes bubba removes the flowed metal from excessive dry firing instead of pushing it back. The shape of the end of the pin is important, some rifles are round with a flat end, others are flat ends with champhered sides.
Rim thickness is around .0400 -
quote:Originally posted by Emmett Dunham
Cleaning the bolt is sometime a good way to get the pin to function right.
Emmett
The bolt is very clean and the firing pin slides freely! The pin and it's retainer slides freely enough that it will easily slide out of the bolt by it's own weight and the firing pins springs are strong and the snap with or without a shell in the gun is loud and a slight chisel shape to the pin but only makes a very small dent in the rim of the case. It kinda appears that maybe the chisel end is blunted off by maybe .005 or so. I'm temped to try drifting the pin forward by approx. another .010 and make a test run???Anyone ever tried adjusting the firing pin depth of a 550-1 Remington rimfire auto rifle??
any ideas?0 -
Due to the unique floating chamber in a 550-1, I would not futz with it- order a replacement pin, and drive on. They DO get worn. 0 -
Ordered firing pin! (ouch)
Could not drive the old pin forward in it's retainer even after heating of the retainer. Have correct size steel wire for pin. May eventually drill out the old firing pin and make up a spare after I see if new pin cures all and can take length micrometer reading of new pin.
Several parts of these guns are going the way of dinosaur eggs, which is reflected in the price of new and used replacements parts.
Have to keep a heads up with Numerich Arms parts, have got some replacement parts in past that were disappointing, like black plastic instead of metal and paid price for metal parts.0 -
Before you try drill out the old pin. You could try lengthening the old one two ways. A glob of weld on the end then reground to shape or peen the shank about its circumference on the hard surface backing. 0 -
this may help 
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