280 AI vs 7 mm SAUM

[Hunterjones]

Both of my SAUMS are on short actions. If I were building one totally from ground up without existing parts I would definitely opt for a medium action that I could load rounds to 3.0" or more in

 

[can1010]

As someone who has had a lee single stage for the last 5 years and yet to actually have it set up, and having this exact debate myself I do have to ask... when will a guy actually be able to purchase factory .280ai again though??

all ammo is impossible right now but I can guarantee you will see 280ai on the shelves long before 7 saum
the reloader don't have it any better though with the supply issues

 

[Hunterjones]

At least if you buy an AI you can USUALLY find several brands of factory 280 REM ammo that you can fireform to make your brass from......

 

[.222 ND]

In my mind component availability is the most important consideration.

 

[Hunterjones]

It's TOUGH right now

 

[Ftothfadd]

Guys, would you be willing post some speeds and barrel lengths and twist rates for your respective rifles?

 

[can1010]

Both of my SAUMS are on short actions. If I were building one totally from ground up without existing parts I would definitely opt for a medium action that I could load rounds to 3.0" or more in

you cant go wrong with the saum on a mid length action. then if you want one of the Sherman saum based wildcats or a simple saum imp. will really step it up

 

[Hunterjones]

The other thing that I've noticed with the 2 280 AI's I own and a couple others I've loaded for is that none of the four shot nearly as well at max loads/velocities as they have about 100 - 150 FPS BELOW what books show as max velocities

 

[Hunterjones]

Both my Coopers have 24" barrels

145 LRX 3050 FPS

160 NAB 2960 FPS


M700 SAUM

23" barrel

160 NAB 2940 FPS with RE 22 but is not stable velocity OR accuracy wise when temperatures get into 70's so my lights out load is a 168 Berger CH 2840 FPS with H4831

22" M7 7 SAUM

140 NAB 3100 FPS

 

[The Oregonian]

I have a 25" 280 Ackley and get 3010 with a 168 VLD and N560. Nosler brass and 210 primer.

 

[Hunter26]

I am building a 7 saum and liked the fact it should perform well with a shorter (20 inch) barrel. Does the 280 ai have the same reputation?

 

[coues1]

I had my 7 saum built on a long action. It has a 24" 1-7 barrel. I am shooting the 175 ELDX 3,025 fps using reloader 26. I would suggest a medium or long action in order to seat the heavy bullets out long.

 

[Hunterjones]

That's a good wuestion

 

[Hunterjones]

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