Hornady 135gr MonoFlex Handgun Hunter

[Bluebird5000]

Anyone have experience with this round?

https://www.hornady.com/ammunition/handgun/10mm-auto-135-gr-monoflex-handgun-hunter#!/

I have no doubt the bullet is designed well, but one thing that keeps me from ordering some is it seems underpowered even considering the copper bullet takes up more space than a traditional lead core bullet:

Hornady 135gr Monoflex: 1315fps
Underwood 140gr XTreme Penetrator: 1500fps
Underwood 150gr XTreme Hunter: 1425fps

Perhaps the bullet is larger due to the large hollowpoint?

Some places restrict ammo to non-toxic options so this would be a nice round for those areas. My understanding is that a 180-200gr xtp will stay intact pretty well when it hits large bones as well so while this seems like a good round, I don't see how it would be better than a 180gr XTP traveling at the same velocity.

I'd appreciate any thoughts you have on this, thanks! Would absolutely love to see some gel tests with it.

[Kenk]

Hey Bluebird,
Depending on your use, Underwoods XTP in a 180, or 200gr works extremely well on whitetail, not sure about the Hornady 135gr Monoflex, but for  /  a deer, a heavier projectile would be a better choice, just my observation in the field

[Markwell]

     The Hornady folks sent us three boxes (60rds) of the new 10mm 135 gr MONOFLEX ammo. It's labelled "CA certified non-lead bullets".  Haven't shot any of it yet, either over the chrono or at game. Am leery of anything made for CA, but we shall see. Hornady claims 95% weight retention and rapid expansion. Will have to try it on a whitetail.

    Will try to post any results when available.

[Bluebird5000]

     The Hornady folks sent us three boxes (60rds) of the new 10mm 135 gr MONOFLEX ammo. It's labelled "CA certified non-lead bullets".  Haven't shot any of it yet, either over the chrono or at game. Am leery of anything made for CA, but we shall see. Hornady claims 95% weight retention and rapid expansion. Will have to try it on a whitetail.

    Will try to post any results when available.

I think being CA certified just means they got it certified so they can market to CA hunters. They are all copper so would be legal there.

I am definitely looking forward to your reports!

[Bluebird5000]

https://www.youtube.com/watch?v=rpaNMO9vLvo

Finally found a clear gel test above. it's a short barrel, but penetrating 11.5 inches is not good penetration. I suspect it would at least meet the 12 inch minimum out of a longer barrel.

I looked on their website and they recommend the .357 magnum version for varmints and deer, but the 9mm 115gr, and .40/10mm 135gr they only recommend for varmints and defense against humans, not deer. That is really disappointing as the box does not specify it is not suitable for deer hunting.

As far as expansion goes those petals expanded well and are sharp so the wound tract should be good. But when I hunt with a 10mm I want a bullet that is going to do good penetration.