Barrel Twist

[Daryl]

12" or a little under, it is then - sure does not look the part, though. Strange. I assume with the camera focus, we can only actually see 6" or so into the bore, yet it appears further.

[Daryl]

After all the replies and interest generated in this odd barrel, I just had to go back into the shop and try to take some better pictures.  Now granted I'm no photo expert by any means.  What I did was tape a piece of tracing paper over the end to try to get diffused light into the barrel to give the shot a bit more depth.  I also fitted up the jag with a .022" bull denim patch, marked the rod and SLOWLY pushed in 1 full revolution, travel was just under 12".  I didn't mean to create such a stir, apparently this is something really odd for whatever reason.



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In this photograph - the land at 6 o'clock, almost makes an entire turn in the length of bore visible. I assume, due to the slightly longer depth of field in focus, that this is almost 12".

[Vomitus]

  I do what Rich Pierce does. Pretty simple. Looks like half a turn, maybe a fraction more. Good pix...

[Daryl]

I think you guys need to look more closely. Following the land that starts at 6 o'clock (right in the middle of the bottom flat), it becomes quite visible again at 8 o'clock then follows around to the 4'clock position.  The actual focal length of the picture is short - but actually shows there is considerable barrel behind where the in-focused lands and grooves seem to stop.
Perhaps my  monitor shows this better than others.

[TommyG]

Daryl,  you are correct, the focal length of the picture does not represent the entire barrel length.  I wish I had a better way to capture this and am open to any suggestions, at least for future shots.  Like I mentioned earlier, when I hold this barrel up and look thru it, it looks like the rifling on my .308(which I think is around 1-9).  I just find it odd that this barrel made it into a longrifle kit, even if it was from the seventies.  Where was the quality control?  Also, probably a good thing the fella I got it from didn't complete it and try to "dial" a load in for it.  He'd probably still be on the range tryin' to figure it out.  Thanks for your input.  TomG

[Daryl]

Glad to help sort it out.  Just looking at the rate of twist, it's obvious to me it is rapid. How, or why a .45 barrel would have that rate is beyond me.  As noted (I think) previously, the most rapid twist in .45 I've ever seen, is 15" & that will stabilize a 700gr. 45 cal. bullet.