I don't disagree with the statements about current production 22 LR ammo. Between late 2004 to early 2005, I stockpiled about 4 cases of 22 LR ammo while shopping at Wal Mart. I bought bricks of CCI, Federal, Remington, and Winchester, including plated bullets, premium bullets, and the "Junk" stuff that causes many problems today.
I have recently bought current production ammo at the Wal Mart clearance sales because prices were low. My firearms include S&W revolvers and M41 pistols, Ruger Mk II pistols, Kimber 22 LR conversion kits, S&W Walther P22, Sig 1911-22, Mossberg 1950 rifles, and a custom Ruger 10-22.
Federal 36 grain HP ammo does not feed in any semi-auto firearm I own, but is reasonably accurate in Mossberg bolt rifles and S&W revolvers. I have not had any problems with 2004 - 2005 ammo firing or chambering, especially the brands that generate a lot of complaints today. My S&W M17 and M617 revolvers had "tight" chambers, but have been finish reamed to eliminate this problem.
Current production ammo by Federal, Remington, and Winchester, in my experience, has all the problems identified in this thread. Quite simply, manufacturers don't make ammo like they used to 15+ years ago. Aguila ammo purchased in the last 2 years has easily chambered, accurate, and been bargain priced. For me the most accurate ammo is CCI Blazers. The Sig 1911-22 (after $225 in after market parts) is accurate only with Remington Standard velocity ammo bought a month ago.