hey guys how fast will a 243 ackley push a 70 grain bullet? i found a long 243 data page that listed it pushing a 70 grain sierra with h380 at just over 3900 fps. can this be? if so i will get rid of my 25.06 and get a 243 ackley.i struggle to get 3700 out of my .06 with a 75 grain v max.it also listed a 55 grain going 4250. yikes . any info would be great! thanks

Hvyw8t,

I think your data is rather optimistic. A realistic velocity from this one with a 70 grain bullet should be around 3500-3600 max.

This assuming normal barrel lengths of around 26".

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saeed@ emirates.net.ae

www.accuratereloading.com

Hvyw8t,

I agree with Saeed.

I think that you would be doing very well to get to 3,700 fps muzzle velocity.

If you want to consider a .243" cartridge I would recommend the .243 - 284 Winchester. I use one for ground hog hunting. With a 75 grain Hornady V-MAX bullet I achieve 3,972 fps muzzle velocity from a 28 inch Krieger barrel. The brass is Winchester. The primer is a Federal 210M. The powder is Alliant Reloder 19.

Good Hunting !

I know this is hard to believe, but,
.243 AI,26" hart barrel ( 14" twist )
90 deg. F. 40' MSL.
70 gr. Nos BT, 86 clicks N550

4038-01-4048
4067-02-4075
4046-03-4054
4020-04-4028
4036-05-4043
-------------
05-4075 +
05-4028 -
05-0047 E
05-4049 M
05-0017 S

Chronograph: Ohler 35P

These were ABSOLUTE MAX. Bolt sticky to open
but primers were not blown although s little flattened.

Nothing like a good chronograph to ring out what a rifle is doing. If you dont't have one buy one they take the guess work out. How about the 6mm gibbs I talk with a guy who had good luck with one.

How much weight in a "click" ? Did you weigh any of the resulting charges?

Jeff, I just saw your home town. I lived on Clemens Unit when I was a kid. That was some great hunting and fishing! 8000 acres of almost private hunting.

Don

[This message has been edited by Don G (edited 05-05-2001).]

Don,
We use "clicks" on the Harrells culver type measure. I don't have the conversion tables at hand, but if someone doesn't do it for me I'll post it if I can find it. You kind of gain a lot of confidence in that measure and hardly ever weigh the powder.

The Clemens acreage must have a hell of a good place to hunt; don't think I would like to live there though!

I was getting 3750 fps out of a 243 imp with a 21.5 inch barrel. using 414 powder. I do not have my load notes with me so no weight on the powder charge. always wondered what it would do with a longer barrrel.

AN INTERESTING AFTERTHOUGHT:
We were also working with a 6mm/284 that same day and it couldn't catch up with the little Ackley (with that powder). Maybe old P.O. knew from whence he came about "overbore", hell, he didn't even like or recommend the .243 improved.

I took a quick look and didn't see any H380 70 bullet loads on my 243AI page that were getting the velocity you mentioned
(http://www.angelfire.com/nd/243ackleyimproved)
But some of the guys are getting some high velocities with H414. Most are with long barrels (26+") and slow twists.

Watch the pressure very close and have fun.

Please e-mail me the page you found the 243AI data on as I am always interested in more 243AI data.

milender@ictc.com

Thanks
Jeff in ND

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243 Ackley Improved Reference Doucment
http://www.angelfire.com/nd/243ackleyimproved

Jeff Crowe; If the bolt was sticky, and the primers "just a little flat" the rifle is trying to tell you something.

duaneinND,
It has spoken and I have listened!
I always work up my loads that way.
I like speed but not at the cost of irresponsibility. I then start backing off
and looking for accuracy, hoping I can find
it at the highest possible velocity.
I appreciate your comment.
Jeff

When shooting a "new" Cooper 243 AI this past weekend I happened to chrono two loads. Both with the 70 grain Nosler bullets. First was with Varget at a near max load and 3468 for 10 rounds. Next was with XMR 4350 and aslo near max... 3450. Perhaps a slow tube, but maybe a reality check. I also was shooting a 28" Hart 6 Remington... yes that one you observant few... and with 107 Sierra's and R22, 3155 was nice and tight, in the low 2's. Problem is the SD on that load was 26. Back to the drawing board for the long range load. Going to try IMR 4831 and hope for low single digit SD's. Hope this helped...