280 AI Load Data Please

[stanley52]

Having a 280 AI built by score high. Blueprinted 700, Bartlein 26" M24 5r 1:9, Manner MCS T4A. Berger doesn't have 280 AI data yet and I was hoping I could get some people's favorite loads. I plan on using: CCI #200 primers, H4831SC, and 168gr Berger VLD's, so if you have a favorite 280 AI load or have some recommendations to make, please share!

 

[MudRunner2005]

Those gun specs will be pretty close to mine, when it's all said & done.

I have been researching Bartlein barrels, and Brux, and about the only blanks I can find are Douglas Air-Gauged #7 contour, and a Bartlein M24 5R blank.

Since the Bartlein is a 5R rifling and a 1:9, I will most likely go with that blank.

I am interested to see the load data as well.

Except for mine I will be using IMR 7828 SSC, and Fed 210 primers, behind the Berger 168 VLDs.

 

[varmintH8R]

I am running 57.0 grains of H4831SC behind Berger 168's. This is a near-max load from data I have seen, so work up with care. I have no pressure signs and could likely go higher but accuracy is great so I'm not messing with it.

 

[Tnwhip]

I could never get the speed I wanted with the accuracty with H4831sc. I ended up getting a good load with H 1000. I shoot the 162 A-max with 63.5 of H 1000 in my 280 ACK..I have Douglas barrel with 1-9 twist. Remember start low and work up.

 

[varmintH8R]

Here are some groups with 160 NABs. The Bergers shoot just as good...

 

[kaseyfied]

I ha e been using 59 g h1000 with a 210m primer.. no pressure signs at all and I am getting .3 at 200 yards.. .10-.20 off the lands with 168g bergers!!

kasey

 

[MudRunner2005]

That's good that H1000 seems to be working pretty well, I have a good bit of it sitting around for my magnums...

But still, I would love to find a load for IMR 7828 SSC, if anyone has a good one for the 160 NAB's and 168 Berger VLD's.

 

[stanley52]

Yes it's nice there seems to be a couple viable powders. Looks like I'm gonna have to pick up some H1000, unfortunately this just complicated the load tuning process.

 

[MudRunner2005]

Unverified load 6590 in caliber .280 Ackley
Unverified load 7577 in caliber .280 Ackley
Unverified load 6575 in caliber .280 Ackley
Unverified load 6520 in caliber .280 Ackley
Unverified load 3504 in caliber .280 Ackley

 

[kaseyfied]

7828 would be a good one as well its rite between 4831 and h1000 on the burn chart.. should get very good results with that...

 

[TOM H]

That's good that H1000 seems to be working pretty well, I have a good bit of it sitting around for my magnums...

But still, I would love to find a load for IMR 7828 SSC, if anyone has a good one for the 160 NAB's and 168 Berger VLD's.

Nosler has start load of 57.5gr/IMR-7828 @ 2856fps max of 61.5gr/IMR-7828 @ 3043fps with 160gr AB for the 280AI. I started 56.5gr/IMR-7828ssc @ 2828fps and worked up to 58.5gr/IMR-7828ssc @ 3038fps using Fed 210M primers and was good accurate load in my 280AI. I've got some Berger 168gr VLD but just haven't had time to work any loads up.

IMR-7828ssc is my back up load using R-17.

Well good luck

 

[Chalky47]

I am working up a load for my .280 A.I. using IMR 4831 and CCI BR-2. Will let you know how this turns out. I do not have a chronograph but I will show my results with load data.

 

[freebird63]

I have tried Retumbo, H1000, IMR4350, H4831SC and IMR7828SSC. It looks like I am going to stay with H4831SC with 160gr accubonds.