6.5 x 55 ackley improved????

bchap22

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Has anyone ever done a 6.5x55 ackley improved or seen any info on them for that matter. I just bought a 6.5x55 brand new in a tika varmint HB and i am interested in turning it into an ackley improved. I know i have a fetish with wilcats but i was just wondering what the AI will give over what i already have.
 
I wouldn't AI the swede, there is lots of excess case capacity and the loads in books are very mild due to all the old actions.

I have a Tikka T3 Hunter in the same and I worked my loads up to the 260 rem max loads safely.
 
I have a custom Sporter built on a Remington 721 action, sporting a Lothar-Walther barrel in a 1-8" twist chambered in 6.5x55 AI. It is bedded into a Grey-Laminate Remington 700 Stock. [Guntech on here did the work]
I am very happy with this chambering. The AI case is a much nicer design for the reloader than is the stock case due to the negligible taper. You do not have to FL resize anywhere nearly as often, and trimming is practically eliminated, unlike the parent 6.5x55.
The gain is about 100-150 fps, depending on the bullet being used. Very, very close to 6.5-284 performance, but with a bit less powder.
My powder choices include: N560, Norma MRP, H4831SC, IMR7828, Reloder 19 & 22.
With the 139/140 grain bullets, 2970 is close to max working pressures in my rifle. It regularly shoots 5 into ½ moa, using a quality bullet.
I believe this is worth doing on a modern action, but am not sure about the surplus actions. Regards, Eagleye.
 
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