Superformance GMX, not impressed Update: recovered one

Here's a 139 grain GMX fired from a 7mm at about 150 yards. It literally went stem to stern and encounterd a lot of big bone on the trip. I'm convinced.

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That's exactly what my GMX 165 out of an 30-06 at 80 yds looked like after traveling through 36" of moose.
 
That's exactly what my GMX 165 out of an 30-06 at 80 yds looked like after traveling through 36" of moose.

Ya, they definitely seem to better mimic bonded bullet performance than that of TSX performance but with all the other benefits of a mono metal bullet. Still great penetration but greatly increased frontal area to create a much larger temporary wound channel. I suspect these offer up much more of the "shock" effect than a TSX due to that increased frontal area. First one I've got back but I'm impressed.
 
That is always the case!!!

I do load the Swift bullets and tend to like them, but I don't have anything capable of extreme velocities.


LOL...seen the same moose 12 times, always in the same place on the other side of one cut (712 yards). Finally set up equipped for some distance and he decided to step out from behind the log pile on my side :redface:
 
I haven't tried the GMX's yet, but I had heard that they need a higher impact velocity to expand than the ttsx's do, possibly because the Barnes bullets are solid copper while the GMX is a harder gilding metal. Can anyone who has actually used them comment? Has anybody had poor expansion with them at moderate or lower velocities?

Also from the load data that I've read, it seems like the companies are hesitant to push the GMX's to the same speeds as conventional bullets. Has anyone hand loading these noticed this, or are you able to push them to similar velocities?

Thanks for any first hand information!
Red
 
I haven't tried the GMX's yet, but I had heard that they need a higher impact velocity to expand than the ttsx's do, possibly because the Barnes bullets are solid copper while the GMX is a harder gilding metal. Can anyone who has actually used them comment? Has anybody had poor expansion with them at moderate or lower velocities?

Also from the load data that I've read, it seems like the companies are hesitant to push the GMX's to the same speeds as conventional bullets. Has anyone hand loading these noticed this, or are you able to push them to similar velocities?

Thanks for any first hand information!
Red

I killed an ibex at 579 yards with one and I've made several kills at 350-420 so expansion doesn't seem to be an issue. Truthfully, the six petal design is made to facilitate easy expansion.

As for speed, considering Hornady loads them in their Superformance ammo, I suspect speed is not an issue. I push them fast out of both a 7mm and 270WSM without issue.
 
I killed an ibex at 579 yards with one and I've made several kills at 350-420 so expansion doesn't seem to be an issue. Truthfully, the six petal design is made to facilitate easy expansion.

As for speed, considering Hornady loads them in their Superformance ammo, I suspect speed is not an issue. I push them fast out of both a 7mm and 270WSM without issue.

did you recover either bullet?
 
Just butchered that last deer tonight. The bullet that I thought exited was actually hiding just outside of the hip - this bullet smashed the front shoulder socket, penetrated the entire deer, exited the skin just in front of the rear hip, and then barely made it back in to the rear quarter. This was at about 250 yards, perhaps a bit more (distance between transmission poles was 400 yards, and I was closer to the one behind me than the one by the deer).

The other one was the one that made it lengthwise through a doe, at about 100 yards. So, both bullets had well over 30" of deer penetration. Both weigh about 134 grains, and both expanded to about .550"

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