7-300 Norma Mag Improved

Joined
Mar 27, 2019
Messages
551
Location
Lyon County, NV
Thanks man! JGS reamers will cut you anything you can dream up lol. They are also super helpful! In this specific case, I’d already had several of the Alex Wheeler 300 Norma Improved chambers done. So basically just called them, and them asked for the same case body specs, but with a neck for 7mm bullets.

Then I just used my same sizing and seating die, but just changes the neck bushings out on the sizing die.

This is one of those mystical areas of gun stuff that's always been of interest but I've never dug into. I think that's going to change. Thanks for the lead, it could be a lot of fun.
 
OP
huntnful

huntnful

WKR
Joined
Oct 10, 2020
Messages
1,605
I’ve killed a couple coyotes and a couple aoudad with it so far. Started shooting the 180 ELDM’s with H1000 for 3160 FPS.
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Tested N570 with 180 ELDM’s recently. Might shoot this when hunting season nears a little closer. Here’s the speeds as well as the case heads.
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Joined
Apr 26, 2019
Messages
1,154
Location
Pacific North West
OP
huntnful

huntnful

WKR
Joined
Oct 10, 2020
Messages
1,605
That’s 15 MOA at 1000 for my elevation 🤣 That’s insane.
Hahaha pretty unreal!!

That SD is great, killer numbers on that Garmin. Care to share a bit about what setup you handload with?
I just run .001 neck tension. Anneal with an AMP annealer. Brush and moly the inside of the necks. Primal Rights primer seater with .002 crush. And weigh my powder charges to the closest kernel on a FX120i scale 🤙🏼🤙🏼
 
Last edited:
Joined
Nov 25, 2023
Messages
5
I love this stuff!

I have a 26" 300 NMI and it's very impressive, but I am moving away from muzzle brakes and going back to 20" barrels with 7-9" suppressors. I find myself having to make quick shots often and I don't want to lose anymore hearing because I didn't take the time to put ear plugs in.

My 28 Nosler will push the 162s @ 3,100 out of a 20" barrel, but I have to run it hard which I do not enjoy.

I am trying to decide whether to build a 20" 300 NMI or a 7/300 NMI.
I'd like to push the 180 ELD-Murders @ 3,100.
The 30 cal bullets are great, but the lower recoil is why I am persuing the 7mm.

huntnful, I would sure like to chat with you before I start ordering rifle parts.

Thanks!
 
OP
huntnful

huntnful

WKR
Joined
Oct 10, 2020
Messages
1,605
I love this stuff!

I have a 26" 300 NMI and it's very impressive, but I am moving away from muzzle brakes and going back to 20" barrels with 7-9" suppressors. I find myself having to make quick shots often and I don't want to lose anymore hearing because I didn't take the time to put ear plugs in.

My 28 Nosler will push the 162s @ 3,100 out of a 20" barrel, but I have to run it hard which I do not enjoy.

I am trying to decide whether to build a 20" 300 NMI or a 7/300 NMI.
I'd like to push the 180 ELD-Murders @ 3,100.
The 30 cal bullets are great, but the lower recoil is why I am persuing the 7mm.

huntnful, I would sure like to chat with you before I start ordering rifle parts.

Thanks!
Absolutely! Shoot me a text if you’d like!

Two09-six63-8120
 
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