Has anyone gotten the Hornady GMX.....

[FOTIS]

to shoot accurately in their rifle? Any input will be appreciated!

 

[DrMike]

Remington .280 Rem, CCI 200, 139 g. GMX, 61.5 g WXR = 3158 fps/0.77 inches @ 100 yd

Remington .280 Rem, CCI BR2, 139 g GMX, 54.0 g A4350 = 2717 fps/0.56 inches @ 100 yd

Remington .280 Rem, CCI BR2, 139 g GMX, 54.0 g RL17 = 3-35 fps/0.56 inches @ 100 yd

Winchester .30-06, F210, 150 g GMX, 58.0 g IMR 4831 = 2996 fps/1.05 inches @ 100 yd

Winchester .30-06, F210, 165 g GMX, 58.5 g. IMR 4831 = 2002 fps/0.74 inches @ 100 yd

I used the 150 grain GMX one season in my .30-06. It made a terrible exit wound in the one mule deer I shot. I've been hesitant to continue using it at this point for that reason.

 

[SJB358]

Mike, do you mean it made a Large hole?

Never loaded a GMX.

Haven't loaded a mono in awhile. I did just load a couple of 168 ETs to try out of my sons 300 Wby and some 180 GS Customs in my Whelen.

 

[boomer68]

Factory Hornady shot well in my 7mm

 

[FOTIS]

Thinking about using them in my 378 Bee.....

 

[DrMike]

Mike, do you mean it made a Large hole?

Never loaded a GMX.

Haven't loaded a mono in awhile. I did just load a couple of 168 ETs to try out of my sons 300 Wby and some 180 GS Customs in my Whelen.

Blew the off-side out of the deer; it left a hole of approximately three inches or so where the bullet exited. Shot was at ~100 yards. Consequently, she circled a copse of trees and managed to make a small water hole about twenty-five yards or so. The lower half of the lungs and the diaphragm was devastated.

 

[SJB358]

Wow, I'd never expected that Mike. Not from a 30-06 and that bullet.

I guess better that way than the other.

 

[DrMike]

I'll need to shoot a few more animals before I can draw a conclusion. My first shot left me a tad startled at how explosive that shot was.

 

[Wyo7200]

My dad shoots the 139 gr in his .280. Went through both shoulders of the mountain goat and was sitting in the shale behind the goat or stuck in the hide- can't remember. The goat was laying down when he shot it. The gmx retained 95%-98% of its mass.

 

[Dr. Vette]

They shoot well in factory ammo in my hunting partner's 300 RCM Christensen rifle.
He took an elk with it in 2012 at ~260 yards, a nice whitetail in 2010 at 305 yards where it went all the way through end to end.

I have not tried them though I do have them in the muzzleloader bullet to test.

 

[super-7]

Yep handloads of the 139 gr GMX shot great groups out of my 7mm, a tad more consistent then the 150 gr TTSX, with what I felt was less copper fouling to boot.
Harvested 3 deer and one moose so far all terminall performance has been on par with the TSX .
My buddy has three deer with the 165 gr GMX and a 300WM. Again bullets terminal performance was good.
And been using them in the 80 gr in the .243 again mostly wacking coyotes but did use it last day of deer season on a WT buck. Worked perfectly. Shoots tight groups out of the Vagaurd too , this guns shot everything I have ran thru it well from 58 gr and 75 gr Vmaxs to 100 gr GK and PTs , POI do change but groups remain a constant MOA at worst , most loads going half that.

 

[efw]

90 gr Blems from MidwayUSA, Hunter, & WLRMs from 257 AI.

I treated em like TTSXs; left a nice long jump to lands. That was my first time out, but haven't tried any other configurations through any other rifles.

 

[DrMike]

Ballisticians at Hornady did advise me to treat these as cup-and-core bullets, loading them to near the lands. They were right. No pressure issues. This is not pure copper, but gilding metal which apparently addresses the pressure concerns.

 

[tddeangelo]

I used them in a 30-06 and got groups from 0.4-something to about 0.7 at 100. My issue was tiny exit wounds even when deer were shot at very close range. I left them and went to Partitions and have been happy since.

 

[efw]

I used them in a 30-06 and got groups from 0.4-something to about 0.7 at 100. My issue was tiny exit wounds even when deer were shot at very close range. I left them and went to Partitions and have been happy since.

IMHO monos are useful when impact speeds are north of 3k; if I use them in standard cartridges I run light for caliber projectiles to get that speed (130 TTSXs in the 06 & 90 GMXs in 257 AI).

You're right to go to another bullet and made a great choice, though I've never found a need for any premium at <2800 impact. Mr Nosler invented that bullet when a short range shot from a magnum and attending high impact speeds caused a bullet failure.