6mm rem versus 243 /6mmack versus 243ack

chrisjordaan · Rookie Member Joined: Jul 24, 2005 Posts: 2

i want to know more about this cal. twist rates speed of 87 to 105/107 gr

popgun

Wow, this post slipped through the cracks and I hope you have not given up on us.
I shoot a 243 Win for varmints and deer with bullets of 55 gr up to 100 gr. I never tried the heavier bullets, the 105-107 gr variety, because the game in my area don't need it.
The twist rate of the 243 Win and 243 AI are usually the same and the 6mm and 6mm AI are the same and different from the 243. The twist rate difference in the 6mm Rem was to make the round more competitive with the 243 Win but it didn't quite work out that way.
The Ackleys are ok if you reload but not necessary. The straight factory 243 and 6mm rounds work great.
You will find a good discussion about each factory 243 and 6mm rounds in any reloading manual. The load data section here at hunting nut should give you an idea of the slim difference in loads and bullet weights between the two calibers. As for the AI's, you wind up with a caliber that uses more powder chasing the velocity dragon. Usually the velocity difference is not really worth the expense of another set of reloading dies. But, if you like to tinker the 243 and 6mm are a good place to start.

chrisjordaan · Rookie Member Joined: Jul 24, 2005 Posts: 2

Thank you popgun for your comments. the reasen i want to know is for shooting 105 A-MAX,and 107 gn sierra both long bullets, in competition to 600 and even 900 meters.
If you can refer me to poeple who can tell me more in that regard.

Shoot well.
chris jordaan

popgun

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