Tuesday, April 03, 2007

LIGHTLINK - Colt Defender Here's the story: Picked up a new

Colt Defender

Here's the story:

Picked up a new Colt Defender two weeks ago. Went to the range, had some extraction problems; fairly random, but every 15 rounds, or so, the extractor would jump the rim and fail to extract. Get it home, check the extractor tension...is very weak. Well, no big deal, was going to have a local smith do a trigger job, so I figure Ill have him tune the extractor while it's there.

I have two brand new sets of Colt original equipment grip panels with Colt gold medallion for a Colt Government model. They have been sitting in storage for the 380 colt mustang. $25 shipped for each pair, buy both sets for $45 shipped.

So, pick the pistol up today (great trigger job BTW) and head straight to the range. Same crap. Head straight back to the smith, he adjusts the tension again. Get home, strip the pistol and check the tension with the extractor in the pistol (using the loaded round/shake the slide method). The extractor barely grips WWB cases, and Corbon and Speer brass falls right out. Scratch my head.

At this point I pull out two other 1911s that I know have perfect extractors (est. 8000 rounds through both with no extraction issues); both Kimbers. I remove the extractors from both pistols, and check the Colt 25 extractor in both. Tension is perfect in both Kimbers. So, I then try both of the Kimber extractors in the Colt...same problem, no tension on the case. At this point I'm getting what the problem is. Nevertheless, just to be sure, I grab a spare extractor to play around with. No matter how much bend I put in the Colt 1903, it still will not grip the case any harder; I had that extractor bent pretty much sideways and it made no ruger p 85 other than barely being able to push it in the channel.

Visually it appears the Colt extractor channel was cut too far to the side of the slide for the extractor to be tensioned, regardless of how much it is bent. Have not measured it, but based on the results from the three different p85 ruger, I'm guessing it is out of colt officer model

Agree? If not, what is your theory?



Ruger 10/22 stock

Subsonic rounds have a Ruger 10/22 stock of 330 m/s (1082 ft/s) or less and are sometimes equipped with an extra heavy,46-61grains 2.9-3.9 gram bullet. Conversely, some rounds contain little more than primer and an extra-light bullet. Subsonic rounds are especially favored for their perceived improved target accuracy, and for hunting. As the speed of sound in air at 20 C (68 F) is approximately 343.4 m/s (1126 ft/s), the subsonic round's muzzle velocity is close to the speed of sound under many hunting conditions, or only very slightly below it. However, under cold air conditions at 0 C (32 F), the speed of sound drops to 331.5 m/s (1087.6 ft/s), essentially the same speed as the muzzle velocity of the subsonic round. Hence, a so-called subsonic round when used under slightly colder conditions than 0 C (32 F) is often no longer subsonic and instability may arise when crossing down through the speed of sound, reducing accuracy. To counteract this, some cartridge manufacturers have lowered the speed of their subsonic ammunition to 315 m/s (1030 ft/s) or significantly less, while other manufacturers still sell subsonic ammunition with a velocity only slightly under 330 m/s(1082 ft/s). Subsonic rounds do not work well in all semi-automatic .22 LR firearms, often failing to cycle the action.



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