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Advice on which .243/6mm

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Unread 08-12-2003, 05:57 AM
Junior Member
Join Date: Aug 2003
Location: Franklin, Pa.
Posts: 24
Advice on which .243/6mm

Ordered a Hart heavy contour in 8 twist the other day. I plan to shoot the 105 A-MAX. I haven't decided on which caliber yet though. Some say the 6mm-284 is a barrel burner, so I don't know. Maybe the .243AI, I have seen alot of these lately.

Any suggestoins???

Also would you have anything done with the neck?
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Unread 08-12-2003, 08:01 AM
Platinum Member
Join Date: Jul 2003
Location: Central PA
Posts: 1,307
Re: Advice on which .243/6mm

243 ack is probably the best compromise for an overbore 6mm as far as efficiency and barrel life go. plus you can get lapua or norma brass ready to go. a buddy of mine has both and he is tickled pink with the results with his 243 ack done by R.W.Hart & son in nescpoeck pa.

Check it Out!!--> Shoot the Smack The Smiley Match...and help
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Unread 08-12-2003, 08:36 AM
Platinum Member
Join Date: May 2001
Location: Pennsylvania
Posts: 1,757
Re: Advice on which .243/6mm


Don't overlook the straight 243 Winchester.

I have a 30" 8 twist barreled rifle in the 243 Win. that shoots to 1100 Yards quite well and with repeatability. The 30" barrel gives much better velocity then a shorter one will in the 6mm caliber.

I use the 105 to 107 gr bullets in it and Lapua brass.
The effeciency of the 243 is well documented and the barrel life is MUCH better then the 6/284 or the Ackley or Gibbs versions of the 6mm.
I also have the 6/284 and have owned the Ackley and Gibbs 6mms over the years so I'm able to made the comparisons.

Good luck in your decision.

Darryl Cassel
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Unread 08-12-2003, 09:38 AM
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Join Date: Jul 2001
Posts: 1,459
Re: Advice on which .243/6mm

Do some research into the 6BR Norma, I think you will be impressed. Many 1000yd BR shooters are now using this and 105/107gr bullets. From 30" barrels, performance is very good, brass and throat life is wonderful, recoil is very mild. Ensure that you are using the long throat version.

If not, I would go with the 243, Reg or AI is up to you, because cases are so easy to get and you can form from 308match brass if necessary.

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Unread 08-12-2003, 03:23 PM
Posts: n/a
Re: Advice on which .243/6mm

Got somthing else for you to think about...

I would have said 243AI.. no brainner..
BUT... I have just finished some test loading with a 6mmAI WOW..

3250fps with a sierra 107 SMK.. not sure a 243AI that can do that.. I still have no pressure signs...

Just another thought.... the only advantage a 243AI has is brass...
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Unread 08-12-2003, 05:12 PM
Silver Member
Join Date: Dec 2002
Location: Bridgeville, PA
Posts: 127
Re: Advice on which .243/6mm

I drive 106 Clinch Rivers 3340 out of my 243AI with no problems out of a 29" Lilja 3 groove. At one time i had them going a bit over 3400 but brass life was bad.243AI Crono Slip

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Unread 08-12-2003, 05:48 PM
Posts: n/a
Re: Advice on which .243/6mm

mbianchini ,

I will get to do more load development here in a week or so....

I hope to get 3500 outta the 107's... we'll see. I know that i can hold more powder and I have a 30" Krieger on this rifle so I should be able to get there...

hmmm.. I like the friendly competition stuff...

[img]images/icons/grin.gif[/img] [img]images/icons/wink.gif[/img]
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