P O Ackley

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07-07-2012, 11:38 AM
madjon_

P O Ackley

Cartridge Performance Gain over Factory Ackley Comment
222 Rem. Mag. Ack. Imp. About 5% more powder capacity More useful if necked up to 6mm
219 Ack. Imp. Zipper 350fps above top 45-gr. factory Zipper load Recommended, but use 30-30 brass post-WWII
22 Swift Imp. Better extraction, case life Mechanical advantage with velocity equal to Swift
22-250 Ack. Imp. 50 to 100 fps, case life Use Swift data and buy RCBS dies with 40" shoulder
22 Sav. H.P. Imp. 300-400 fps with 70-gr. 228-cal. bullets One of best 22s with heavy bullets
243 Ack. Imp. Extraction, case life Mechanical advarltage; originally a customer request
244 Rern. Ack. Imp. Very little gain in any bullet weight Auth. note: use RCBS 6mm Ack. Imp. 40 in 6mm rifles
25-35 Ack. Imp. 500-600 fps with 100-gr. bullets Recommended, use 30-30 brass post-WWII
250 Sav. Ack. Imp. 300-400 fps with 100-gr. bullets Recommended, Ackley's all-time favorite
257 Robts. Ack. Imp. 300 fps with 100- or 120-gr. bullets Recommended. Ackley's "all-around" cartridge
25-06 Rem. Ack. Imp. About 200 fps with 100-gr. bullets Not recommended, despite customer success. "Overbore"
270 Win. Ack. Imp. Little or none with more powder Not recommended, factory 270 is better
7x57mm Ack. Imp. 300-350 fps with 140-gr. and 200-250 fps with 175 Recommended, more useful to avg. shooter than 7 mags
280 Rem. Ack. Imp. 250 fps with 140-gr. bullets Recommended, 7 mag veloc. in '06 case30-30 Win. Ack. Imp. 250-300 fps with 150-gr. bullets Recommended, excellent for lever guns
30-06 Spfld. Ack. Imp. 100-150 fps in any bullet weight Recommended, equal to 300 H&H
30-40 Krag Ack. Imp. 500 fps with both 150s and 180s Good, but not many rifles can use. Hot
348 Win. Ack. Imp. 200-250 fps above 348 factory load Recommended, better case life, less thrust
35 Whelen Ack. Imp. 5% powder capacity, 100-150 fps in 200s, 225s. 250s Recommended, flexible big game cartridge
50th EDITION.
07-07-2012, 03:20 PM
Sidney

Dredging my memory banks but I believe that the factory loadings for 280 Rem are used as the control/start point for the ackley gains used here?

The 280 Rem was originally developed and chambered in lever gun options? And consequently were not particularly highly pressurised factory rounds... Handloading a standard 280 in a modern action was considerably better than earlier factory offerings?

The gain shown above may be reflective of those low pressure loadings on the standard case? It may not be as significant against a well developed standard 280?

I may be wrong about this.....like I say I am relying on memory....
07-07-2012, 03:51 PM
hunter308

Sidney the 280 rem is a long action cartridge based on the 30-06 as the parent case. You are thinking of the 284win which was the caliber put out in a lever action.
07-07-2012, 04:34 PM
sneeze

That correct Sidney, Remington chambered it in there lever and semi autos trying to find something to compete with the 270 winchester.Pressures where lowish. They try ed renaming it in the late 70s "7mm express" and quoted higher velocities but it didn't take off and created a bit of confusion so they went back to calling it .280 rem. As to the gains with the ackley improved unless your properly set up with pressure testing gear and worked up in 280 then re chambered to AI in the same barrel its just guess work but the gains are there along with a few other benefits.
07-07-2012, 04:40 PM
Kiwi Greg

As mentioned above in regard to the 280 gain, look at the gain or lack of it in the 270 ???
07-07-2012, 04:58 PM
Sidney

Quote:

Originally Posted by hunter308

Sidney the 280 rem is a long action cartridge based on the 30-06 as the parent case. You are thinking of the 284win which was the caliber put out in a lever action.

Pretty sure that I know what a 280 Rem is as well as a 284 :D
07-07-2012, 05:03 PM
Sidney

Quote:

Originally Posted by Kiwi Greg

As mentioned above in regard to the 280 gain, look at the gain or lack of it in the 270 ???

Yeah.. getting 250fps on a 280 rem and nothing on a 270 sorta tells something about the factory loads of the 280...

You do get a wee bit extra usually on the same case with a bigger bore but 0-250fps from .277 to .284??

Heck my 6.5x55Ackley from factory loads 140s in the standard 6.5x55SE at around 2400-2500 to over 3000 is even better... :D
07-07-2012, 05:09 PM
Kiwishooter

Quote:

Originally Posted by madjon_

Cartridge Performance Gain over Factory Ackley Comment
25-06 Rem. Ack. Imp. About 200 fps with 100-gr. bullets Not recommended, despite customer success. "Overbore"
270 Win. Ack. Imp. Little or none with more powder Not recommended, factory 270 is better
280 Rem. Ack. Imp. 250 fps with 140-gr. bullets Recommended, 7 mag veloc. in '06 case30-30 Win. Ack. Imp. 250-300 fps with 150-gr. bullets Recommended, excellent for lever guns
30-06 Spfld. Ack. Imp. 100-150 fps in any bullet weight Recommended, equal to 300 H&H
50th EDITION.

Seems rather strange to me that out of all those 30/06 based cases you get a performance gain from Ackleyising the 25/06, 280 Rem and 30/06 yet no gain for the 270W..........very strange.
07-07-2012, 06:07 PM
tui_man2

AI should be done if you are thinking of it, they look plain sick in all cals an all gain from it. An fire forming not a issue. Load them an hunt. Then do load development after.

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07-07-2012, 08:10 PM
R93

Longer brass life is a bonus as well.