PART II...What's deadlier, a .25 or .30 caliber airgun?
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- เผยแพร่เมื่อ 6 ต.ค. 2021
- Hi everybody! This video is Part II of my examination of the deadliness of the .25 and .30 caliber airguns when set to the same energy level. Below is a link to the written article that accompanies this video.
Link to the written article:
www.bakerairguns.com/general/...
Link to Baker Airguns website:
www.bakerairguns.com
This is with non-expanding pellets. With equal fpe, the 25 would have more velocity and less frontal area to expend it, so it makes sense that it would penetrate deeper. By limiting the 30 cal FPE to that which the 25 can attain, you are placing the 30 at a disadvantage. Max out both calibers with a mid weight expanding slug. Also if the rifle you're using isn't able to shoot 30 cal projectiles to their full potential, that is another disadvantage for the 30.
Donnie, I love the video (actually all of them) however comparing two different calibers at the same FPE only proves that one caliber performed better at the fpe tested, not that it is "actually" better. This is a logical fallacy. When comparing the total surface area of the projectiles .30 has 44% more surface area than .25. This means that to make the test fair you should have taken the 70 fpe that you were shooting the .25 at and increased the fpe by 44% for the .30. 70 X 1.44 = 1.08. So basically you should have been shooting the .30 at 100 fpe for a more accurate comparison.
What were the velocities of each pellet? If both are making same energy, it would seem the .30 cal is handy capped by the lower velocity required for both to obtain equal FPE? I believe the sectional density of both projectiles are very close. The deciding factor is velocity. Redo test and run the 30 at the same velocity as the 25. My hypothesis is wound channel length will be similar if your testing was based on velocity. Your findings appear to be accurate based your parameters. Based on my understanding (I'm no expert) Hydrostatic shock is generally said to start at velocities above 2000-2200 fps. The temp wound cavity must expand greater than the tissue's ability to stretch and recover. Air gun hunting is most similar to bow hunting as cause of death will be from organ damage or loss of blood, not hydrostatic tissue damage. I've enjoyed your part 1 & part 2. Please do a part 3 and make your test based on velocity and repeat with same projectiles. I wonder how the extra PFE of the 30 will effect the test?
I like to see the same tests at around 70-100 yards. I think that distance is more representative for real life situations and could give other results.
Here’s my 2 cents. I’m looking at the fx wildcat bt. The rated fpe for the 30 is 113. The rated fpe for the same gun is in 25 is 90. You’re point is valid if both calibers are traveling at the same fpe, however, most the ti,e they aren’t. The 30 is traveling about the same speed as a 25. I’m going with 30
People underestimate the power of air guns …. They are almost self defense worthy nowadays
A pigs skull is not as hard as a 1/2 oak board so im confused but i can tell you its all about fps not fpe because we are comparing 25 vs 30, not "fpe",,the test you did was what pellet penatrates deeper with same fpe. Now do a test with same fps..better yet i think ill make that video, lol, but still a good video thanks
30 cal is significantly slower then the 25 cal. The 25 cal will do more based on the velocity. Increase the fps of the 30 to be on par with the 25. You'll get different results.
I chose the .25 caliber because it was in the middle of the range of choices. .50 caliber has far more disadvantages to be reasonable and .177 was out of the question, so it basically came down to magazine capacity and air consumption. The .25 caliber is a perfect all around size that covers all the bases and checks all of the boxes.
Can a .30 cal still humanly kill a hog?
This was one of cooler TH-cam videos I've seen in awhile. Educational, informative, funny, and most importantly entertaining. I love this guy doesn't take himself too seriously.
I took delivery of a Hatsan Mod 130S in 30cal. I do NOT have a chronograph to shoot over for velocities but the "Sound" of the 30cal pellets striking the back of the pellet trap is FEROCIOUS!!
Ok, love the premise of the video. I love the science of it. BUT, and I hope this makes sense to many reading it, FPS for the .30 was way too low compared to the .25 cal. For some reason, we have lost love for FPS and gained so much more attention and respect for FPE (not me). WHY? Well, there can't be FPE without FPS and GRs (weight). FPE is a biproduct of FPS and FPS + GRs of a projectile will determine penetration/tissue damage. Lead dome pellets are basically solids and it take a lot to deform them to any degree. The .25 cal pellet is much narrower than the .30 cal dome. The .30 cal dome is short and stubby as opposed to long and slender like the .25 cal dome you used. As a matter of fact, they might be similar in length. So with comparable FPE #'s, the .30 is easier to stop and will do LESS tissue damage/penetration. Also, the more FPS you have, the more a bullet will deform under stress when it hits water based mass such as flesh. And FPE is calculated as FPS x FPS x Grains / 450240.
Love your video Donnie I been watching them since you were doing them in the basement in your house. You cut through the BS and show the true numbers love it!
Watched both videos. They both made sense, and as a bonus .25 through .27 caliber projectiles have better ballistic coefficiancy allowing them more accuracy and range as well. Thumb up on both videos. 😎
Excellent demonstration !
All I can say is you are brilliant. I just wish I could articulate myself as well as you do.. in my videos. And I love that you gave us informed pertinent and real world information. You didn't give any speculation or so-called hearsay. I really really love these kind of videos. I enjoy soaking up real information and progressing in my learning. I look forward to your future videos
from my research it seems .25 is better close range but the .30 retains its energy at over 100yds
Once again - excellent content Donnie. My Physics teacher was a Major in the British Army. At age 12 this main impressed on me the following example of Force over Area. He took a Plimsole and flayed my arse with it for being insubordinate. Disappointed with my expressed level of anguish. He changed tack, and used an Ebony Ruler on my thigh. Still frustrated by my less than adequate expression of remorse or apology. He then used a cane. The Plimsole left red marks. The ruler left a welt. The cane split my cheeks open. I still didn't apologise, but I learned my Physics lesson. Guess I got a head start on some folks. And to further support my real world experiences of training Load over Area. As a qualified Structural and Civil Engineer, I had to walk around my Construction Sites in Boots. As a trainee site manager, fresh out of TECH - My Supervising Project Director gave me a safety briefing Day 1. THE most important point - DO NOT RUN AROUND ON SITE! Here's the thing - I'm then 22 weigh 205lb and train 5 nights a week for three sports. Running, fast, was a competition. SO I ran on site. I ran over broken bricks, lengths of 4 x 2 . Formwork, Trench Shields, you name it - everything. That is, until the day I ran and had a nail come up through my boot and right through my left foot! I mean ALL the way through!!! Now, I'd run over hundreds of lumps of 4x2 and bricks and not one penetrated my boot. I ran onto ONE nail and it nearly ruined my sports career. My Boss - when he saw me at the First Aid Shed - took one look and walked away. LOAD on cross sectional area dictates penetrative force folks. Fell free to try this at home on yourself. For the armchair experts - place the hand you use the least on a hard flat surface then, taking your wifes rolling pin with the other hand....................
Very interesting!! I do disagree with you about the entry wound. To me the 30 looked like there was more damage but I also feel this would play into what you are saying and that the .25 retains it's energy to cause more penetration after the initial hit. Great stuff man!!