The Accurate Reloading Forums
Weatherby rifle freebore in non-Weatherby Mag rounds

This topic can be found at:
https://forums.accuratereloading.com/eve/forums/a/tpc/f/9411043/m/612100764

19 April 2006, 09:22
OldCenterChurch
Weatherby rifle freebore in non-Weatherby Mag rounds
How would the freebore in my Weatherby Accumark 300 Win. Mag. compare to any other factory 300 Win. Mag.? Is the excess freebore found in all the Weatherby rifles or just those chambered in Weatherby Magnum cartridges?


WAR EAGLE!!
19 April 2006, 14:29
malm
The infamous excess freebore is usually reserved for the Weatherby Magnum cartirdges.
19 April 2006, 16:16
jeffeosso
From weatherby, their reamer dimensions include the long freebore for their own cartridges. They do not do this for other commerical rounds, with the possible exception of the 338-06 Asquare, as that has a long throat

Any round described as "long throat" has and/or a long throat or lead, and, it's a pretty cool thing when/if you are shooting barnes bullets

jeffe


opinions vary band of bubbas and STC hunting Club

Information on Ammoguide about
the416AR, 458AR, 470AR, 500AR
What is an AR round? Case Drawings 416-458-470AR and 500AR.
476AR,
http://www.weaponsmith.com
20 April 2006, 02:32
jørgen
quote:
Originally posted by malm:
The infamous excess freebore is usually reserved for the Weatherby Magnum cartirdges.


This type of freebore is realy the most genius thing evér created by Roy.

Corectly performed it makes any barrel(specialy with short twistrate) shoot mutch better with a mutch wider range of bullets and bullets wheight and shapes.
Feks a 223 in 8" twist performing sub inch groups with bullets from 40 to at least 75 grains.
The same is productionwise also possible in 22-250 in 10"twist
20 April 2006, 02:44
malm
quote:
Originally posted by jørgen:
quote:
Originally posted by malm:
The infamous excess freebore is usually reserved for the Weatherby Magnum cartirdges.


This type of freebore is realy the most genius thing evér created by Roy.

Corectly performed it makes any barrel(specialy with short twistrate) shoot mutch better with a mutch wider range of bullets and bullets wheight and shapes.
Feks a 223 in 8" twist performing sub inch groups with bullets from 40 to at least 75 grains.
The same is productionwise also possible in 22-250 in 10"twist


We should probably change the term from freebore to throat since it is fixed. Freebore can be anything based on seating depth.
20 April 2006, 02:53
jørgen
What Roy realy did was making a long cylindric frebore followed by a long forcingcone.

What hapens is that especialy bullets with short guiding diameter leaves the not perfectly centered case, enters the freebore of close to bulletdia, thereby beeing better alighned by the bore, before entering the rifeling, This reduces tendency to "wobeling" og the bullet.