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.013" LARGER than the 'groove diameter [.723"])' of his gun seems more than a bit excessive to me. I'm surprised the chamber allowed such a large projectile in the case.

I see no problem whatsoever of using a .736" bullet in any .736" barrel.

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Actually It is not too crazy if you think about what happens in a conventional Parodox barrel. Let's say the bore is .738" and you slug is .736. The slug travels down the bore and enters the choke 4" from the muzzle. The Fosbery slug passes thru the smooth portion of the choke and is reduced to .690", then engraved and spun in the ratchet rifling in the final 2".

In the Colindian, it seems, the massive reduction of slug size may happen at the "forcing cone".

DRJ,

Try the Fosbery slug you have, if you need a mould, I will loan you one. Use 2 3/4" cases. I expect your Colindian to regulate @ something between 1070 and 1170 fps. If you are using the Ross/Sherman Unique loads I immagine you will be safe. This is a trial and error business. So, once you determine your concoction is safe in your Colindian, you might as well start trying...

Good Luck, please keep us informed.

Edited by CommandCar (11/08/11 10:25 AM)

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