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2506deerslayer's picture
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Location: Nebraska
Joined: 12/24/2002
Posts: 118
.264 win mag ackley improved

I was wondering if anyone has ever seen a .264 win mag ackley? If so where would be the best place to get a reamer?

exbiologist's picture
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Location: Colorado
Joined: 09/19/2008
Posts: 2399
no

I have a .264 Win Mag, and can't see where the improvement would be.  PTG would make you the reamer.  If you want to improve the .264, the best way to do it would be a .264-300 Win Mag as it would bump the shoulder up and still fit in a standard magazine.  There isn't enough taper in the body, nor a gentle shoulder on a .264 to go with the classic Ackley Improved formula and see any gain.  My solution was to just run a longer barrel.  I can get 3200ish with 140s, 3375 with 130s, 3500 with 120s and 3700 with 100s with my 27.5 inch Lilja barrel.

2506deerslayer's picture
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Location: Nebraska
Joined: 12/24/2002
Posts: 118
  Thanks for the reply, I

  Thanks for the reply, I just worked up a load with my 26 inch barrel with 120's at 3275, I think I could actually get more cause I'm not showing any sign of pressure yet. I am using 66.5 grains of reloader 25, I think I could go with about 67 or a little more. If I shoot out this barrel I will replace it with a longer one. It groups so well that I can't relplace it yet. I have gotten consistent .5 inch groups with it. I did run those final finish bullets thru it also. It is so easy to clean now also.

  I bet that .264-300 would be a screamer.

exbiologist's picture
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lots of room left

I'd imagine there's at least another 100 fps left there.  

JJD
JJD's picture
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Location: Right Side WA state
Joined: 11/07/2008
Posts: 208
Barrel wear

Those 264 win mags chew up barrel throats pretty fast.

Does the Ackley change in shoulder angle help aleviate this problem?

Seems as if speeding it up might make it worse.

exbiologist's picture
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Location: Colorado
Joined: 09/19/2008
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no

All overbore cartiridges are hard on throats.  increasing case capacity relative to bore size only worsens things.  The .264 is no worse than any Weatherby cartridge, the 7mm Rem, STW, WSM etc

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