make sure the mag is not off to one side. Mine did that and I had to put epoxy in the magwell to shim the mage over to the opposite side it was rubbing.

 

Mag does move a little. I’ll look into that. Thank you.

 

Call Ruger! Ask questions about the problem

 

I emailed them, but have heard nothing back. I will give them a call tomorrow.

 

Always call them. They are great to work with sir

 

Yes, I called them before with an ejection issue and they were very helpful and took care of the issue quickly.

 

Great News!

 

Magazine is loose in the mag well letting the front tilt just low enough to not feed smoothly. Bullet is hitting the top of the chamber hard enough to cause the scarring. I glued shims to mine and cured the problem. I'm a one mag user so not much work was involved to correct the problem. Brass shim stock and aluminum coke can material made for a good but drop free fit. Goop was the adhesive.

 

Would love to see some pics if you have them. Did you shim the mag well or the mag itself?

 

Sorry to take so long to answer and no pictures of the fix. I shimmed the magazine as it's the only one I use with the rifle. It a try until fits thing. When it is tilt free inserted but will still drop free It's good. Mine came with the 15 round mag which was so loose it flopped back and forth when seated in the rifle. I removed it and threw in my spare parts box where it remains in new condition and robbed a 10 round mag from one of my 10/22's. It was loose too but shims stopped the lead shaving and accuracy improved. I should have dumped the 15 rounder in the trash because it will never be used but I am kind of a pack rat when it comes to guns parts.

 

If you are comfortable doing this you could polish the edge of the chamber. It cannot hurt anything. I have not done this so I might start with 1000 grit rigged up with some way to spin it. Or work by hand. Just going after the edge, not inside. My gut feeling is 600 would be best. The go back to 1000. There are other way to polish with cotton and abrasive compound. I would want to round over that edge a bit more than I expect you get polishing compound. The only reason for a sharp corner at the chamber end is the extra manufacturing cost to give it a slight bevel. I would not be bothering Ruger over somehting like this, but that is not a criticism. It may sound critical but I am more DIY person and this sounds like typical Ruger machined to a price. Sharp edge tiny little burr. I am sure it all goes away as the bullet moved down the barrel. It would bug me to know this and I would correct.

Edit: This is not to contradict the magazine alignment. Perfect straight in feeding is always better. Brass shim stock is a must have for any serious DIY gun guy.
I use a small metal shear about the size of scissors. IIRC - This is where I got mine, many moons ago:
McMaster Carr, assorted 12 pack of 6x12 rectangle. Lifetime supply.
shim stock | McMaster-Carr

 

I use a small metal shear about the size of scissors.

I have always used kitchen shears for brass. They are just heavy duty scissors. Regular sewing scissors for coke cans.

 

On the bottom of the bolt the part that pushes the bullet into the chamber will dig into the next bullet . So if you polish that a LITTLE , it may rub but will not dig into the next bullet .