250 savage Ackley vs 25x47 Lapua?

[std7mag]

A lot of 250 AIs have 30-deg or 35-deg shoulders. RCBS promoted the 30-deg version.
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Then it's an Improved, but not Ackley Improved.

 

[SweaterDood]

.25-08 (.25 Souper)

The Souper is a very nice round but not optimized in a standard Short Action. Seating the 131-135gr bullets ahead of the neck/shoulder junction won’t fit very well in AICS/AW length magazines. Also the 25x47L and 25CM will propel these bullets to the 2900-3000+ FPS range, so the extra powder room isn’t necessary for that application.

The Souper is the longer cartridge in the 1st pic and 2nd from the left in the 2nd pic. You can see that the bullet seating is not even close to optimized at magazine length. The 25x47L case is the empty one in the lineup, and 25GT is the shorter in the jaws, for reference.

 

[SweaterDood]

Some dummy rounds for barricade practice in the back yard. They are loaded to the same length as my match rounds. At this length they should function in any short action magazine.

My chamber was teamed with the JGS no-turn 0.130” FB, purchased from Blackjack’s website. I would have liked 0.160” FB ideally, but I didn’t have to wait 4-6months on the reamer this way...

 

[FNSafari]

Some dummy rounds for barricade practice in the back yard. They are loaded to the same length as my match rounds. At this length they should function in any short action magazine.

My chamber was teamed with the JGS no-turn 0.130” FB, purchased from Blackjack’s website. I would have liked 0.160” FB ideally, but I didn’t have to wait 4-6months on the reamer this way...

You can always get a throating reamer. On the chambering I’d go with a 257 Roberts or Roberts AI if your action will accommodate the loaded round.

 

[ebb]

Pick what ever you can get the best brass for, with the lest amount of work.