Thread: 280 Imp max

I have just got this going this weekend.

It was originally a .280 Rem 700 XCR II.



It has the usual goodies, McMillan Hunters Edge stock, light weight firing pin, fluted bolt & factory 24" barrel.



I chucked a 30 cal T2 Terminator brake on it I had lying around & it timed up perfectly, recoil is non-existant.



Initial load development is looking very good with 162s extremely happy at 30-3050 fps, shooting 1/2-3/4 moa in wind strong enough to blow my chrony over

180s aren't showing as much promise yet at 2875-2900 fps, which isn't an issue as this case really suits the 162s with their lack of recoil, especially with a suppressor.

Here it is with 162, 180 beside the 7 Rem Mag.



Considering it isn't even bedded into the stock yet I'm really looking forward to getting it sorted, might even get a suppressor organised for it.

Yo dawg we pimped your 280AckImp and gave it an extra 50pfs!!

What load and powder behind the 162?
Mean rig

Originally Posted by K95

Yo dawg we pimped your 280AckImp and gave it an extra 50pfs!!

Bit harsh mate, makes you sound like a bit of a penis

Just having a laugh tiger, seems a bit odd to improve an improved cartridge to gain seemingly only 50fps or so.

Well if your going to improve it why only half do it?

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When back up the range this arvo, still a bit windy.

Really very happy with the performance so far, pretty much 7RM velocities or better considering the 24" barrel, with 10-15% less powder, great for suppressor & barrel life



Shame the shooter wasn't concentrating a bit better....

Originally Posted by Danny

What load and powder behind the 162?
Mean rig

Thanks Danny

I use ADI 2225, 67-68 grains, kinda won't fit in a standard 280ai without compressing the hell out of it, gives the best velocity so far.

Might try RL 33 but it will probably be too slow for the 162s, could possibly perk up the 180s a fair bit

Originally Posted by Kiwi Greg

Shame the shooter wasn't concentrating a bit better....

Do you need me to come back & show you how it's done bro

Originally Posted by Philipo

Do you need me to come back & show you how it's done bro

Yep could be a good idea

Any real world difference over a 7mm saum or 7mm wsm?? the disadvantages are obvious and the advantages are?

Originally Posted by von tempsky fan

Any real world difference over a 7mm saum or 7mm wsm?? the disadvantages are obvious and the advantages are?

I guess disadvantages that are obvious are long action required & fire forming.

I guess advantages are, fits in a standard magazine, more rounds in a standard magazine, good brass available, more velocity, could be made in a lighter action Kimber etc

Its just something a little different, giving a bit more performance

280 cal is underrated I reckon (not even biased )

My 7x64 will do 2913 fps with 55 grains of H4350 with the 162 amax I don't know whether it's worth an extra 12 grains of powder for a 100 odd fps

I get 3050fps with a 280ai and 61gr of rl22 but it is hardish on the brass, Nosler custom 280ai brass only lasted 4 reloads before the pockets loosened up. I'm backing down to 60gr and 3025 fps for the new brass.

Barrel is 26"