Hey Pops2,

I have never heard of this so did some Googling and found a site called Alpha Precision, Inc.  Here's a description from that site.

Taylor Throating is offered in .22, .32, .357/.38, .40, .41, .44, .45, and .475 calibers.  Essentially, the barrel throat is lengthened one and one half to two calibers, and enlarged to slightly over groove diameter.  The throat serves as the throat in a rifle barrel, enabling the bullet to become perfectly aligned with the bore before engaging the rifling.  The "choking" effect present from tightening the barrel into the frame is removed as well.  The rifling leade is a very gentle 1 ½ degrees.  On average, when tested before and after using a Ransom Rest, 50 yard groups have been reduced 40 to 50%.  The improvement is there using both cast and jacket bullets.  I have not detected a change in velocity using cast bullets.  Before and after chronographing is within standard deviation of each test.  Using jacket bullets, there is a slight loss, less than 50 fps in all the tests I’ve conducted.  If the barrel cylinder gap is adjusted to minimum at the same time the Taylor Throating is done, there will not be a velocity loss with jacket bullets, usually a gain of 25 to 50 fps.

Very interesting stuff... anyone ever done this?

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