Ruger scraping bullets.

[Deus Machina]

My dad just bought a 22/45 MkIII for my birthday, and unfortunately no place around here will let you test fire before buying, and--understandably--won't let you load it up to check.

But it looks like it's scraping a good little flat onto the nose of the bullets when it loads them, and I think I've tracked it down to a couple spots--the tiny lip where the feed ramp meets the chamber, and the sharp edge of the slightly-too-short feed ramp. It's worse when they go sliding up starting at a low angle, and nonexistent when I start the round in by hand and let the bolt shove it home.

i trust myself to a little basic 'smithing with a file--I'm a machinist by hobby--but I'm asking the experts whether carefully rounding the feed ramp into the chamber will break the seal at all or not, or adversely effect feeding.

Now, if I can figure out how to ease the edge on the bottom of that ramp...

 

[nicholst55]

While I'm not intimately familiar with the gun (my very old Mk I Target is 8,000 miles away), it sounds like you're on the right track. Try a round Arkansas stone and a bit of oil on the sharp edge of the feed ramp.

Alternately, a Cratex bullet-point polishing tip in your Dremel at fairly low speed - just don't go crazy with it!

 

[Deus Machina]

I'm worried about the sharp lower edge. It looks like the problem is that it's a little high, and catching the tip of the bullet to shear. It appears to be much of the problem.

Filing it will only raise it further.

It hasn't affected it feeding yet, but I'm worried what a flat on the tip of the bullet will do to accuracy at range.

I'd like to add a little length to that feed ramp, if I could only find some way that would handle it.

 

[Chawbaccer]

Send it to Ruger and have them fix it. They have good customer service and will go completely thru your gun and pretty much give you a custom job.

 

[gun4funtime]

+1 on send it to ruger, let them fix it.

 

[Deus Machina]

Alright, sounds like my best bet. But I think I'll wait on that a little while as long as it's not damaging the gun. I just got this, and wanna spend some time using it.