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All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Big Bore AirGun Gate => Topic started by: melloroadman on March 21, 2011, 11:30:40 AM

Title: Bullet talk
Post by: melloroadman on March 21, 2011, 11:30:40 AM

By some of the best . Good wet weather reading . Good history . Marvin
http://www.lasc.us/Fryxell_Book_Contents.htm (http://www.lasc.us/Fryxell_Book_Contents.htm)

Title: Re: Bullet talk
Post by: lloyd-ss on March 21, 2011, 11:47:44 AM

Marvin,
Excellent! Thanks for the link. I will soak it up!
Lloyd

Title: Re: Bullet talk
Post by: Brushy Bill on March 21, 2011, 01:29:07 PM

Lloyd, found this in chapter 6
Throat and Groove dimensions.
"Ideally, a cast bullet should  be fired through a long taper. A taper of about .0015 is ideal, if it can be achieved. The old time barrel makers who made match grade target rifles actually lapped a long taper into their barrels tapering from .002 larger at the breech to minimum diameter at the muzzle."

The more I read, the more excited I get about
the possibilities of lapping the land diameters
on the barrel liners.

Title: Re: Bullet talk
Post by: lloyd-ss on March 21, 2011, 02:31:27 PM

Bill,
Son of a gun!  So that taper that I ended up with is a good thing.  Glad you suggested that barrel lapping procedure.  I've got a pile of liners!

I need to get out to the range and do some shooting for accuracy, but I need to touch the crown up from the lapping, first.  The power levels across the chrony are good.  I also need to order some soft bullets and work with those.  I feel the ones I have now are just too hard.

Lloyd

Title: Re: Bullet talk
Post by: JonnyReb on March 21, 2011, 10:00:41 PM

 This is an "over the top" reference guide, Marvin i hope you don't mind but i added this link to the BB sticky, Great stuff in there, thanks, J

Title: Re: Bullet talk
Post by: Butcher45 on March 21, 2011, 10:06:26 PM

Excellent resource!

Title: Re: Bullet talk
Post by: melloroadman on March 21, 2011, 10:31:04 PM

I would like to find a time line on the history of the art of casting . Marvin

Title: Re: Bullet talk
Post by: lloyd-ss on March 22, 2011, 11:05:47 PM

Quote from: melloroadman on March 21, 2011, 10:31:04 PM

I would like to find a time line on the history of the art of casting . Marvin

Marvin,
I like the way you put that: " the art of casting."  A lot of science to it (temps, alloys, cooling, etc) but a lot of art and tricks and experience also.
Lloyd