243 to 6mm rem

Ammo Junky · December 10, 2006, 06:05 PM

Can a 243 be rechambered to 6mm rem? Can it be rebbled to it? Will the bolt face and mag work? Is it true that the 6mm rem has a much longer bbl life despite better performance?
Thanks

ammo.crafter · December 10, 2006, 07:45 PM

All that expense for what advanage?

James K · December 10, 2006, 08:15 PM

No, you can't rechamber without having a bulge in the fired cases. The shoulder of the .243 is larger than the 6mm Remington is at the same point, so you would have, in effect, two chamber shoulders.

You could have the barrel set back and rechambered or the rifle rebarrelled, but, while I like the 6mm a lot, there is not enough difference (IMHO) to justify the cost of the work.

Given the same powder charge, same bullets, etc., there is not going to be any difference in barrel life. The main advantage of the 6mm is that the case can take a couple of grains more powder and can be loaded hotter, but that will certainly not be an advantage if you are looking for longer barrel life.

Jim

Rangefinder · December 10, 2006, 08:22 PM

It's the same bullet, with almost the same powder and load spec's and very close performance capabilities--it's very close to being the same rifle. At the cost of trying to rechamber a .243 you aren't really going to get a noticable difference. If you do want to go to 6mm Rem, just buy a 6mm Rem and spend the rest you would have spent rebarreling/rechambering and buy brass.

James K · December 10, 2006, 09:16 PM

While the .244/6mm Remington has advantages, its main reason for being was simply that Remington hated to put ".243 WINCHESTER" on its rifles.

Jim

December 10, 2006, 06:05 PM	#1
Ammo Junky Senior Member Join Date: March 11, 2006 Location: IL Posts: 537	243 to 6mm rem Can a 243 be rechambered to 6mm rem? Can it be rebbled to it? Will the bolt face and mag work? Is it true that the 6mm rem has a much longer bbl life despite better performance? Thanks __________________ Will work for brass. I apologise in advance for spelling errors.

December 10, 2006, 07:45 PM	#2
ammo.crafter Senior Member Join Date: June 25, 2006 Location: The Keystone State Posts: 1,970	All that expense for what advanage? __________________ "Peace is that brief glorious moment in history when everybody stands around reloading". --Thomas Jefferson

December 10, 2006, 08:22 PM	#4
Rangefinder Senior Member Join Date: August 4, 2005 Posts: 2,017	It's the same bullet, with almost the same powder and load spec's and very close performance capabilities--it's very close to being the same rifle. At the cost of trying to rechamber a .243 you aren't really going to get a noticable difference. If you do want to go to 6mm Rem, just buy a 6mm Rem and spend the rest you would have spent rebarreling/rechambering and buy brass. __________________ "Why is is called Common Sense when it seems so few actually possess it?" Guns only have two enemies: Rust and Politicians.

December 10, 2006, 08:15 PM	#3
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	No, you can't rechamber without having a bulge in the fired cases. The shoulder of the .243 is larger than the 6mm Remington is at the same point, so you would have, in effect, two chamber shoulders. You could have the barrel set back and rechambered or the rifle rebarrelled, but, while I like the 6mm a lot, there is not enough difference (IMHO) to justify the cost of the work. Given the same powder charge, same bullets, etc., there is not going to be any difference in barrel life. The main advantage of the 6mm is that the case can take a couple of grains more powder and can be loaded hotter, but that will certainly not be an advantage if you are looking for longer barrel life. Jim

December 10, 2006, 09:16 PM	#5
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	While the .244/6mm Remington has advantages, its main reason for being was simply that Remington hated to put ".243 WINCHESTER" on its rifles. Jim