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Well, just a quick peek at the Nosler #6 manual shows slightly better than 100 fps gain with 180gr bullet. Maybe this is why Ackley thought it was a "fail". Not enough gain for the effort.
However nearly 3000 fps with a 180gr bullet out of an '06 is nothing to sneeze at.
Just wanting to know if anyone can validate this thru their own experience.
I love the 30-06, but I'm also a sucker for the unusual. So, I'm giving thought to having one of my 30-06s rechambered to 30-06 Improved.
Anyone have any experience with the 30-06 Ackley Improved? If so, what did you think of it? What kind of velocity increase did you see?
No experience, but here is Nosler's reloading data for both rounds:
http://www.nosler.com/nosler-load-data/30-06-springfield/
http://www.nosler.com/nosler-load-data/30-06-springfield-ackley-improved/
As jLuck said above, really surprising considering the improvement of the 280 AI over the 280.
There was no .260 (Rem) in Ackley's day.The 260 and 280 fared pretty well in Ackleys hands too....
Going by memory, I believe the '06 Ackley was considered a "fail" by Parker himself. It is kinda weird how the .280 AI was such a improvement and wildly successful and yet so close in caliber to the .30.
I believe the reason the 280AI became so successful is twofold. When the 280 was introduced it was intended for Remington's semi-auto and pump rifles. Remington thought it best to keep pressures a little lower than similar cartridges like the 270 and 30-06. The lower pressure of the factory load is part of why the improved cartridge is able to boost such large gains, but I think what is a larger factor is that Remington didn't start with the 30-06 case when making the 280, they started with the 30-03. The 280 case is longer than the 30-06 and especially when "Improved", gives more room for powder.
Hmm, a 30 version of a 280 AI?