270 wsm or 280 ackley

[Mike Moss]

PJgunnner,

The 280 AI is not a wildcat but an improved cartridge. How can it be a wildcat if it shoots factory loads? One could shoot factory loads forever in an improved chamber and never handload it! Not only that but the 280 AI is a SAAMI cartridge and in fact loaded by Nosler!

If you say that your 150 gr 270 load is safe in three rifles what did HP White report? Show us the data please.

As to the magazine article I have not read it.

There is other data however. Nosler #5 shows a max of 2905 fps with a 24" bbl in the old 270 and 3007 fps out of the WSM verison with the same length tube.

Here is the maximum velocity from the Hogdon site for the old 270 150 GR. HDY
COL: 3.285"
H1000 59.0 C 2831
51,000 CUP, 24" bbl.

Here is the maximum velocity for the WSM version with the same length tube.
150 GR. HDY SP (Maximum Load) COL: 2.740"
RETUMBO 70.0C 3071

So there you have it. On top of that the WSM is available in lighter rifles. Whats not to like?