Some Excellent Information on Ammo

I have felt the same way. After watching the controlled stripping and loading in slow motion of a vudoo I understand why they shoot well.



barsik said:
great post, thank you. I would like to add my own observations to the elusive quest of 22 accuracy. when I bought a Tikka T1X I was very impressed with the quality of the bore and the fit of the bolt, and was quite disappointed when cycling the action to chamber a round. no matter how concentric the cartridge is, the trip into the chamber after getting stripped out of the magazine was quite brutal. seeing obvious hard contact with the feed ramp and knowing that this would cause the bullet to become misaligned in the case made me do some delicate reshaping and tuning to the feedlips and the extractor. now the trip into the chamber is very much like the older controlled feed centerfire bolt action rifles. no matter how perfect the cartridge is, a hard ride into the chamber can cause accuracy issues. another possible cause of bullet misalignment is trying to squeeze that tenth cartridge into the magazine, I only load 5 in my magazines even if they hold 10.
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Mystic Precision said:
Most rimfire bolt rifles use control rd feed.... QC from the factory can vary but in general, their designs are sound.

Jerry
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One of the advantages of push feed is that a round can be easily loaded directly into the chamber, rather than having to be fed from the magazine. Single shot .22LR rifles are push feed. So too are many repeaters. Anschutz, Tikka, Sako are some examples of push feed .22LR repeater rifles. While some shooters say the Bergara B14R is controlled feed, the Bergara website itself says it is a push feed. (For the Bergara, see h ttps://www.bergara.online/en/rifles/rimfire-series/B14R-steel-rifle/)

Controlled round feeding designs are more expensive. The Vudoo V-22 uses a controlled round feed as does the RimX. What other .22LR rifles are CRF?
 
Control rd feed simply means that the case head/rim is grabbed by the bolt BEFORE it is chambered.. ie you can move the case forward and back without having to first chamber the rd. Just go play with your rimfire and see how/when it controls the rd as it exits the mags. For rimfires, if you have a double claw bolt, you have a control rd feed bolt. At least, I have not seen one that worked differently.

Push feed doesn't fully engage the rim until after the case is chambered... when the extractor claw jumps over the rim. On a push feed, if you partially chamber a rd and pull back the bolt, the case stays where it is. Think Savage 10 or Rem 700.

So by my definition, pretty much all popular rimfire rifles are controlled rd feed... I thought the 10/22 was a push feed but to my surprise, it isn't

Many controlled feed rimfire actions can also single load.. ie you can close the bolt on a case you have physically placed in the chamber w/o first being picked up from the mag. There are also simple mods to centerfire bolts with "claws" to allow them to do this and work as a single feed action.

Jerry
 
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When I worked at CIL in the 60's, our plant turned out about 1 million rounds of 22 ammo a day.

We had a separate "Match Line" making match ammo. The ammo that made spec was packaged as Rifle Match. The stuff that almost made spec was sold as Pistol Match. The ammo with the occasional flyer was sold as Canuck.

I heard that we lost money on Match because too much ammo failed QC.

One of our engineers went to England to see how Ely did it. He came back and said that they just fired up the line and cranked out match ammo.

I assume that all the makers have testing and a trickle down system with one grade being the best and then lesser grades. It all started as the same ammo, but some lots are better than others.
 
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