Home Forums Reloading Big Game Rifles Load Data 280 Ackley

It is my understanding from talking to Bill Holber those sciroccos like a lot of jump so you may want to try seating some 0.025" deeper at a time maybe 0.075 & 0.100 off and see what happens then fine tune if there is any improvements...

Ken what is that load like on deer? Devastating I would imagine

I shoot a Kimber Hunter .280 AI, and tried a number of different combinations. I settled on 64.5 H4831SC with a 120 Nosler BT for one load and 62.0 RL26 with 150 Partitions for the other.

The 120 BT load hovers right at 1" for 5 rds at 100 and averaged 3192 over the 25 rds I put over my Magnetospeed over several different days. 64.0 gave the same group size, 65.0 saw groups open slightly. I got more velocity out of 120 TTSX's, about 45-50 fps at each charge weight, but the group size was slightly larger, so I stuck with the BT.

The 150 Partition load is a little better; closer to .75" and averaged 3094 through 25 rds. 62.5 opened up more than .25", so I stuck with 62.0. That kind of accuracy from Partitions hasn't been the norm for me with other rifles, but I'll take it.

I tried H4831SC, RL22, and H4350 with the 120 BT's and TTSX's. I tried RL26, RL22, H4350, and IMR7828SSC with the Partitions.

Among the other bullets I tried were 140 Nosler BT's and AB's, and while RL26 was the best there, as well, it wasn't as good as the Partition, so I dropped the BT's and AB's and went with the 150 Partition.

Like CRoy, I have a friend who loves Scirocco's and he also likes more jump than you tried for the rifles he shoots them in. I'd say maybe try the jump and some R26.

A big factor for my Kimber has been JB's often pointed out suggestion of making sure the forward sling stud is not on/touching the front rest/bag. I tested it purposely with those two known loads and it made a visible difference in group size. I don't know if you've paid attention to that, but I'll point out, just in case.

I currently only have one 280AI, three 280’s and two 7mm RM’s.
In general I am more interested in accuracy than top velocity. One of my 7mm RM’s is a Ruger, it’s fine for 120 - 162 grain bullets, but my 700 is more accurate with many combinations, including 168 ABLR bullets.
I really have not played with this AI to know it’s preferences. My stock Remington 700 280 is another that is so accurate that I’m not sure why I have the others.
The 280AI is on a blue printed 700 action with a quality fast twist 26” heavy varmint barrel - I am hoping with some low drag bullets I might be able to get prairie dogs at 1/2 mile with high percentage of hits.
I opened this thread hoping to get good long range low drag loads. But it seems to be more of a pissing contest. “My cartridge is better than your cartridge.“
I like all three cartridges,
To get the same velocity out of a smaller capacity case you normally have to have a higher peak pressure load. I could care less if a shooter loads his cartridge “A” hot enough to equal cartridge “B”.

What I’d like to see is 280AI loads with ~ 175 +/- grain low drag bullets.

My two cents...

Not sure yet. Going to try to test it this year. The POI is close to the same as my 139 LRX main load, so I don't have to change anything.

I have tried the 120 grain TTSX and did notice considerably much more tissue damage than the 140 TTSX owhich I was also using at the time.

I know the Barnes don't "blow up", but it seems like above 3200 is where things really get shredded up. For behind the shoulder shots, I expect it to be quite dramatic.

Peterson 280 AI brass and in stock

https://www.grafs.com/catalog/product/productId/84705

Thanks!

Quite a bit heavier than most brass but very good quality and affordable.

Capacity less than Nosler?
Odd picture. Looks almost like they nickel plated the forward area, but I imagine it is just a rendering of the annealing coloration.

They are quite a bit heavier posted my load data with Peterson brass, forward area is anealed.

I'm going to give the Peterson brass a try. Ordered yesterday. Starting from scratch so I don't have anything to compare to with them. Still waiting on the action so it will be a while before they get put to use.

I'd like to try some also

Post your loads please, weighed Petterson 280 AI brass with primer 209 gr, 280 RP FF Brass with primer 204 GR. I posted my loads and speeds with 24" barrel.

Anyone else have any good results with RL 26 especially with the 139/140 gr bullets

I have been shooting the factory Nosler 280AI 140gr AccuBond ammo and it is slightly over 3200fps out of my 26" barrel, I have been trying to figure out how to replicate that load except using the 140gr VLD-H.

This thread has the relevant data I have found, just wondering how many of y'all are having success hitting that 3200fps mark?

I should have mentioned that I finally found some more VV N165 in stock and no longer have to be stingy with the little I had. I have seen Tim in TN and 280Ackleyrized posts on the subject, so I know where to begin.

In 3 of them with 140's and RL23 24" tubes 3220-3240fps

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