7 rem mag or 280 ack?

[rharfo]

Old question but I have set parameters that I'm working in.
Gun is to be built. Will be saami spec 280 or 7 rem with 1/8 ish barrel.
I have:
7 rem mag dies and brass.
Hundreds of 180 gr bullets.
8 lbs H1000
Fed match primers 210 and 215
Currently have a ackley chamber 280 rifle and dies.
So I will need 280 ack saami dies and brass.
Tired of fire forming.
Rifle will have a 26 inch barrel and a brake.
Must hit 2950+ with 180 class bullets.
Will be used for 1k shooting and hunting.
RBros just posted a 280 ack for sale 24 inch running 2950 with 180's.
Thoughts?

 

[just_jon]

I have both and prefer the AI. I'm getting between 2890 and 2910 fps with the 195s in a 8 twist 26" barrel. While I have not yet tried the 180s, I think 3000 fps is easily doable.

 

[Hand Skills]

If H1000 is a set parameter, 7RM

The .280AI will make 2950 in a 26" bbl but I'm thinking it needs a double based powder to get there.

@lancetkenyon ?

 

[just_jon]

If H1000 is a set parameter, 7RM

The .280AI will make 2950 in a 26" bbl but I'm thinking it needs a double based powder to get there.

@lancetkenyon

Good observation. I'm using N570.

 

[MagnumManiac]

I went though all current 7mm cartridges, and some older one's recently. I had 2 unfired REM 700 Sendero II barrels sitting here, both are factory 9 1/4" twists in 7RM. Looked at brass availability and decided to purchase 200 R-P 7STW cases and a reamer and chamber both barrels at the same time for the one action.
I am really happy with my decision, I had 2 7RUM's that lasted only 700 rounds with good accuracy, this cartridge should go beyond a thousand rounds with the powders I use.
With the choices you have listed, the 7RM would be my choice hitting 3,000fps with 180's, pressure is not going to be an issue in that cartridge doing so.

Cheers.

 

[ARlife4me]

7 mag

 

[trout004]

7 mag

 

[FireFlyFishing]

7 mag