7mm rem mag improved

[hunter87]

Hey guys, looking at purchasing a rifle that's chambered in 7mm mag improved. I'm familiar with improved cartridges, but not this one. Comes with 100 pieces of once fired brass but no dies. I can't seem to find dies for a 7 mag improved anywhere, would anyone be able to point me in the right direction? Can't find a lot on guys improving on the 7 mag so looking for some input on it also, thanks!

 

[RichCoyle]

Have it rechambered to 7 STW. I think it would probably be cheaper.

 

[hunter87]

Have it rechambered to 7 STW. I think it would probably be cheaper.

It crossed my mind, I was thinking 28 nosler if I went that route

 

[HRM Johnny]

Tag

 

[FEENIX]

Hey guys, looking at purchasing a rifle that's chambered in 7mm mag improved. I'm familiar with improved cartridges, but not this one. Comes with 100 pieces of once fired brass but no dies. I can't seem to find dies for a 7 mag improved anywhere, would anyone be able to point me in the right direction? Can't find a lot on guys improving on the 7 mag so looking for some input on it also, thanks!

The 7MM RM cartridge has very little to improve upon other than a sharper shoulder angle, and only you can determine if your investment in time and money is worth your effort. He has a different goal, but @Mike D Texas did an improved .264 WM (basically the same as the 7MM RM cartridge). Hopefully, he'll chime in and provide you with some insight to help you in your decision-making. Good luck!

 

[Philward]

Hey guys, looking at purchasing a rifle that's chambered in 7mm mag improved. I'm familiar with improved cartridges, but not this one. Comes with 100 pieces of once fired brass but no dies. I can't seem to find dies for a 7 mag improved anywhere, would anyone be able to point me in the right direction? Can't find a lot on guys improving on the 7 mag so looking for some input on it also, thanks!

How does the current owner load ammo if he doesn't have dies? At least have a source for where to get them. I wouldn't buy a rifle with an oddball chambering unless the dies were included.

 

[Rflshootr]

How does the current owner load ammo if he doesn't have dies? At least have a source for where to get them. I wouldn't buy a rifle with an oddball chambering unless the dies were included.

That's probably why the rifle is for sale.
With once fired brass. What headstamp is on the fireformed brass? What action is it built on?
What I'd like to know is, who had that chamber reamer?
Here is some reading. Check the fireformed case against a standard Rem Mag case.

7mm Ackley Magnum Questions - The Firing Line Forums

7mm Ackley Magnum Questions The Art of the Rifle: Bolt, Lever, and Pump Action

thefiringline.com

 

[hunter87]

How does the current owner load ammo if he doesn't have dies? At least have a source for where to get them. I wouldn't buy a rifle with an oddball chambering unless the dies were included.

I do not know the current owner. A friend of mine has a gun shop and purchased a collection from a widow. Said there was brass for it but not dies that they could locate. The rifle is gorgeous hence the want, if worse came to worse I would rechamber. But if I was able to find dies then it would be a plus

 

[hunter87]

That's probably why the rifle is for sale.
With once fired brass. What headstamp is on the fireformed brass? What action is it built on?
What I'd like to know is, who had that chamber reamer?
Here is some reading. Check the fireformed case against a standard Rem Mag case.

7mm Ackley Magnum Questions - The Firing Line Forums

7mm Ackley Magnum Questions The Art of the Rifle: Bolt, Lever, and Pump Action

thefiringline.com

It's headstamped Norma 7 rem mag brass, it's built on a ruger no. 1

 

[Rflshootr]

Check with CH Tool & Die. Page #10 on their site.
You may have to send them a couple of fired cases to be sure. $116/set. Not a bad price at all.

CH Tool & Die

Ch tool & die

www.chtoolanddie.com

7mm Ackley Magnum

 

[FEENIX]

I do not know the current owner. A friend of mine has a gun shop and purchased a collection from a widow. Said there was brass for it but not dies that they could locate. The rifle is gorgeous hence the want, if worse came to worse I would rechamber. But if I was able to find dies then it would be a plus

If you like the rifle and are willing to spend an additional cost, you can send it to a die maker for a custom-built die since you have spent brass from the gun. This way, you get the custom die for the "actual" improved cartridge. Good luck!

ADDED: Unless you know the "actual" cartridge improvement, do not buy just about any improved die. For instance, a few versions of the .338 Norma Magnum Improved, some with varying shoulder angles from 30-45° and some with shorter necks like my 338 Thor.