High Penetration ammo for .25?

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Just going by what is printed on the tin! To each his own, meaning try different ammo, what works well for one person might not be what another wants or needs. Pretty sure you can get these in many calibers
 
Poly mags, and pellets like them, are exactly the opposite of what you are after as they will penetrate far less than most other pellets as they are designed to expand quickly. It really doesn't matter what it says on the tin it has been proven, time and time again, with testing in the field.

As has been mentioned one of the heavy weight domed pellets, like the JSB monsters, would be good as well as the Crosman domes and hollowpoints as they are a harder alloy, than most pellets, so don't expand much. Accuracy, as has been mentioned, with these is usually much better also.
 
If you want penetration, you want your ammo to be as thin (in diameter) and as light as possible. Name of the game is to get something really sharp moving really fast so that it "cuts" through your target. Hollow points will expand well and are good for hunting but will not penetrate very deep. Going off what bio said, they will dump their energy very fast if they have the chance to expand.
 
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Lots of good responses!



1. The quarry is for a pest control operation to remove Muscovy ducks - trapping failed and so we have permits to use air guns. it is completely legal, to the point the Sheriff’s deputy was spectating and saying “nice shot.” I know ducks can be a touchy subject. Tonight is operation #3, and will likely be the last op.

2. Muscovy ducks are the M1 Abrams of ducks. The reality of the operation is we dont get sufficient chance for head shots, as once the first duck goes down, the rest start to “turbo waddle” and looking all around. So that leaves body shots.

3. It’s difficult to hit the heart from the majority of angles because they are THICK with feathers and bones. Most of the shots had to come from the side. They have VERY thick feathers, and so to get at the heart means penetrating a thick plumage, a wing, sometimes wing bones, then more plumage between the wing and body, then a lot of bones, and Muscovies have some pretty hefty skeletons.



4. As far as I know, nothing like a “pointed slug” exists. I did fare well with pointed Eun Jins, NSA 55-grain slugs, H&N Barracuda Hunter Extreme, and JSB Exact King Heavy. I got the best penetration from NSA 55gr, but they’re tough to cram into the breach. Eun Jin penetrated well when it actually flew straight. JSB was kinda in the middle, but i didn’t use it much, in favor of heavier ammo.



5. Did not fare well with lighter ammo. My go-to is NSA 26.8gr and it was on the light side of penetration. Polymags won’t penetrate like I need them to - too many layers of feather, meat, and bone will open up their expansion.



Final thoughts:

If there’s a non-lead alloy pointed ammo that is also heavy - perhaps even domed - I think that would be close to what I would need.




 
If you want penetration, you want your ammo to be as thin (in diameter) and as light as possible. Name of the game is to get something really sharp moving really fast so that it "cuts" through your target.

I've got field results that verify this. The lightest slugs moving the fastest penetrate the best. They actually deform easier into slimmer profiles as well, penetrating further. But I still think the crosman/Benjamin pellets would do better on bone (I see 18.13 verified this in earlier post as well) 

There is a reason that domes are so prevalent. Sharply pointed ammo rarely has good accuracy. While the opposite is true for dones