Rimfire Central Firearm Forum banner
  • Whether you're a greenhorn or a seasoned veteran, your collection's next piece is at Bass Pro Shops. Shop Now.

    Advertisement

deepest penetrating 22LR ammunition

1 reading
17K views 31 replies 23 participants last post by  Skeeve  
#1 ·
I was doing some tests on water jugs and found some standard lead round nose outpenetrating various high velocity hollowpoints, which would probably make sense. Anyone know or have done tests on the the most penetrating 22LR ammunition through water, gel or similar soft media? Purely for general interest I am not looking to take a 22LR on a buffalo hunt :D
 
#3 ·
I don't know for sure, but I would think Aguila 60 grain sss. You need a faster twist barrel for these though.
Yup, the 60 grn is prone to tumble out of the standard 22rf barrel.

A hyper velocity rn right behind the shoulder would probably be best for lethality on the cape buffalo. That or aim for the nose when its facing head on.
 
#12 · (Edited)
Yes - and it is worth remembering that the formula for kinetic energy is E = 0.5*Mass*(Speed squared)

Or, if you double the speed, the energy increases by a factor of 4. A heavier projectile at lower speed will have to work much harder to equal the energy of a smaller, faster projectile.
 
#10 ·
What makes for penetration...

What makes for penetration is a combination of sectional density, velocity and the makeup of the bullet. Velocity and energy alone is a poor predictor. The .220 Swift at about 4,000 fps having a typical bullet will expend almost all of it's energy on the surface, seldom penetrating to where the killing happens in a large animal. Very low velocity but very high sectional density and a hard point will out perform most everything. Example, an arrow. The only thing against the 60 gr. Aguila sss is that it is a hollow point and soft. Even so, having 50% more weight and very high sectional density compared with 40 gr. bullet, will out penetrate every thing else that I have experimented with.

Gun writers for years have been enamored with high velocity. It gives impressive energy levels and these writers love to talk about superlatives. But energy figures mean very little. And what ever they mean needs to be taken in along with other factors. Having a large meplat for example increases killing power. So you can have a .38 Special at 850 fps with a round nose lead bullet and the same with a wad cutter of the same weight, and the wad cutter will be far more effective at killing than the round nose bullet.
 
#14 ·
What makes for penetration is a combination of sectional density, velocity and the makeup of the bullet. Velocity and energy alone is a poor predictor. The .220 Swift at about 4,000 fps having a typical bullet will expend almost all of it's energy on the surface, seldom penetrating to where the killing happens in a large animal. Very low velocity but very high sectional density and a hard point will out perform most everything. Example, an arrow. The only thing against the 60 gr. Aguila sss is that it is a hollow point and soft. Even so, having 50% more weight and very high sectional density compared with 40 gr. bullet, will out penetrate every thing else that I have experimented with.

Gun writers for years have been enamored with high velocity. It gives impressive energy levels and these writers love to talk about superlatives. But energy figures mean very little. And what ever they mean needs to be taken in along with other factors. Having a large meplat for example increases killing power. So you can have a .38 Special at 850 fps with a round nose lead bullet and the same with a wad cutter of the same weight, and the wad cutter will be far more effective at killing than the round nose bullet.
Its an interesting subject I find.
The target media is also important. Arrows as you say penetrate well on flesh/fluid but pull up badly on bone. A 223 with steel core outpenetrates a 308 with steel core on steel. However the 308 will beat cinder blocks more easily.

Also twist rate makes a difference relative to the bullets. Tests with big game guns show tighter twists with the same calibre/solid bullet combo penetrate further.

This is why I was wondering if anyone has done any tests with 22LR rounds as trying to go off the figures may not equate to real world. I might buy some aguila and others and post some results.
 
#11 ·
The Aguila 60 grain sss I have are round nose, not hollow point. Maybe they make both, I don't know. I don't know anything about the science of it. I just know when you shoot a mud bank you can definitely hear the difference on impact! Either one would do a number on whatever you hit.
 
#15 ·
Hollow point of solid ?

Now I don't really remember if the 60 gr. Aguila sss ammo I have is hollow point or solid. It is up North where the rifle is. I know I bought some of the ammo when it was new on the market, a million years ago. And I bought some more recently. I guess I need to get back the Cape to find out. 77 year old memory cells mostly work, but I don't get as dogmatic about what I remember any more, having been proven wrong more in recent years.
 
#19 ·
This may sound counter to whot you might intuit, but I recall a coupla 'penetration tests' where the Remington Sub Sonic rounds out penetrated most other rounds used in the tests, inclusive of many hyper velocity & hi velocity rounds. The bullet may appear to be a hollow point, but it isn't; rather, it has something to do w/the mfg. process as it mostly does not expand, but it does penetrate remarkably well. Just saying. Dunno if I was just lucky or whot, but got several cases of it from early production that has proven to be capable of some very good accuracy @ 50 yards off a bench w/rest and bags in more than one rifle. Dunno about buffs or mud bank sounds, but you may find the results interesting against some test materials. I don't recall ever shooting a critter w/any of it, so can't speak to that personally.
 
#23 · (Edited)
It could warn you of a bullet that over penetrates and could continue on thru and hit something unintended. I personally would have the bullet stop in the target animal thereby using up all its energy in the best way. Take for instance full metal jacketed hand gun loads can often pas thru a human with little damage because of the small wound channel. This is why so many new defense loads have been developed to mushroom so well that they attain near .45" in dia. and retain most of their weight being fired into ballistic gel. One of my favorites being Federal HST any weight standard velocity.
I digress I think this illustrates my point regarding over penetration of a 22 LR.
I can think of a good result of high penetration, would be a quartering shot at a coyote at 50yds or farther.
Gabby lives up to his moniker once again!:D
 
#25 ·
I think I remember CCI once said that SGB was the hardest lead and
designed to penetrate , so it was the one that will do so the farthest.
I also remember an article in Shooting Times of yesteryear, done by
them that concluded the same.
NOW, this is old info, and maybe some new round has come to town and
taken over the top dog.
I go with SGB.
 
#28 ·
Simple physics, (is there actually such a thing?), will tell you that heavier has more energy imparted upon impact than lighter...

For example:
Throw a golf ball as hard as you can at someone standing 10 feet away, and they will be pissed.
Now throw a hardball...
Now throw a softball...
Now throw a 16 pound bowling ball...

Golf ball moving fastest does little- if any- physical damage, but the bowling ball will knock him down, (I will neither admit nor deny using a bowling ball as a defensive weapon), and likely break bones, (if the guy is stupid enough to stand there while you toss these things at him).

Hyper velocity and most high velocity ammo does so by way of very light bullets, which slow down upon impact much faster, hence less penetration. I have seen ground hogs hit with HV ammo that never reached the vitals.

High velocity are usually lighter, same end effect.

Standard to Sub Sonic velocity are heavier and slower, so more energy is imparted giving them greater penetration, and they slow down, well, slower.

I shot a ground hog with the Aguila SSS at about 70 yards, and it went through his head and kept going, never did find that slug.

Just one Old Vets experience and opinion...