My Midway heavy barreled  rifle fails to extract with CCI Blazer  ammo.  This is after cleaning barrel and chamber.  
Do I likely need new extractor? spring?

go to weaponkraft and purchase the volquartsen exact edge extractor and get the buffer while you are at it.

Quoted: My Midway heavy barreled  rifle fails to extract with CCI Blazer  ammo.  This is after cleaning barrel and chamber.   Do I likely need new extractor? spring?

That's funny you say that, my new fav. plinking ammo are the blazers, and they work great! (in my gun)
They even work in my BC hot lips mags!    And I'm using the stock extractor!

But yea, sounds like the VQ exact edge will fix your problems.  
If you don't already have the other goodies...go with an "ultimate kit".  I think weaponkraft sells these.
They come with trigger stuff, buffer, extractor, auto bolt release, ect.  

Quoted: My Midway heavy barreled  rifle fails to extract with CCI Blazer  ammo.  This is after cleaning barrel and chamber.   Do I likely need new extractor? spring?

I had the same problem with a WP barrel....replaced the extractor with a Volquartsen and it fixed the problem.

Replaced the extractor  and now get failure to fire.  Firing pin makes broad dent in case,
almost like bolt is no longer closing all the way.

duds work when then loaded into 22/45 pistol.

Advise please?

Bad ammo?(blazer)

The Instruction Manual that I got with my Ruger 10/22 states that "STINGER" Ammunition should not be used in a "Target" rifle.

""Stinger" cartidges have a longer case than 22 LR cartridges loaded to U.S. Industry Specifications.  They can stick in the tighter chambers of target rifles, including the Ruger 10/22 Target Rifle, which can result in a hazardous ruptured case and release of hot powder gasses and brass when fired."  ......pg 15 of the Ruger 10/22 manual.

The "Blazer" ammo I have has the same length case as the CCI Stinger stuff.

Quoted: go to weaponkraft and purchase the volquartsen exact edge extractor and get the buffer while you are at it.

I've done that and still get a fair amount of FTE in my 10/22.  Is there a way to tune the extractor?

I expect I have found  my failure to fire problem.  My firing pin was broken.  The tip broke off and
a much larger area was trying to impact the case.  It should go good now.

The new exact edge extractor fixed my fte troubles.

Quoted: Quoted: go to weaponkraft and purchase the volquartsen exact edge extractor and get the buffer while you are at it. I've done that and still get a fair amount of FTE in my 10/22.  Is there a way to tune the extractor?

no you just replace it with the volquartsen exact edge extractor.

if that doesnt help i would suggest either double checking your install, alignement or check/tune you mags.