Crossman HPs
Printed From: Kiwi Airgunners
Category: Technical
Forum Name: Reviews
Forum Description: Rate your airgun or pellets here
URL: www.kiwiairgunners.co.nz/forum_posts.asp?TID=810
Printed Date: 15 May 2024 at 4:10am
Software Version: Web Wiz Forums 10.14 - http://www.webwizforums.com
Topic: Crossman HPs
Posted By: flock
Subject: Crossman HPs
Date Posted: 12 May 2023 at 7:41pm
Brain fart those Crossman Hollow points in 177 look the business,
did an expansion
test at point blank range into
water,
using a 6 ftp HW45
pistol. Here are the are the results. |
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| Pellet |
grs |
speed/ power |
mm |
Xmm |
Expansion |
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| Accupel |
8 |
6 ftp |
4.5 |
4.59 |
0.09 |
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| JSB |
7.7 |
6 ftp |
4.4 |
4.57 |
0.17 |
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| JSB |
8.5 |
6 ftp |
4.35 |
4.54 |
0.19 |
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| Crossman HP |
7.8 |
6 ftp |
4.49 |
4.5 | 0.06 |
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| So the Crossman are too hard, with the
JSBs winning quite considerably |
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Replies:
Posted By: RangerPete
Date Posted: 13 May 2023 at 2:32pm
Hi Flock,
Which JSB’s did you test, did they also have a hollow point?
Pete.
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Walk quietly, but carry a big stick.
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Posted By: flock
Date Posted: 13 May 2023 at 5:37pm
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No standard jsb domed pellets
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Posted By: RangerPete
Date Posted: 13 May 2023 at 11:07pm
👍🏻
I’ve often wondered about this…
What is required to get a hunting pellet to expand and turn into a “mushroom”???
Obviously this is only relevant to “hunting pellets”, wad cutters for paper target shooting and pellets just for plinking don’t need to dump energy, mushroom and deliver devastating terminal perform, they just need to be accurate and hit what u were aiming at.
I think there are 3 factors that contribute to how easily a pellet will mushroom (ie dump energy and create a bigger wound Chanel):
1- hardness/softness of the lead. - softer lead will deform easier.
2- shape of the pellet. - a hollow point will require less energy to expand then a pointed pellet.
3- velocity/fpe at impact. - the faster it’s going the more energy it will be carrying to help it deform.
I think most hunting pellets are made from lead that is too hard, I.e. they don’t mushroom at practical velocities.
Imagine if pellet manufacturers made specific pellets for different energy guns!
For example a JSB Hades in .177, 8gr that is designed to mushroom and expand to twice its bore diameter, at 10.5fpe.
And another JSB Hades also in .177, 8gr, but made from slightly harder lead designed to expand to twice its bore diameter, but at 20fpe.
I guess that’s how things progressed to slugs… use a softer lead, make a deeper “hollow point” cavity, and push it faster!
Sure would be great if we had pellets that mushroomed at lower velocitys!
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Walk quietly, but carry a big stick.
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Posted By: flock
Date Posted: 14 May 2023 at 9:55am
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Yep the crossman design with the right softness of lead would be ultimate, at 6 fbs they is only pushing 420 fps have to re do the experiment with the TX200 at 14 flbs.The thing I saw on U tude was Yanky with a Pcp doing stupid speeds that couldn't possibly be accurate.
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Posted By: jwabfrog
Date Posted: 15 May 2023 at 8:40am
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I've not had much luck with hollow point pellets achieving any mushrooming. I shot multiple 22 hades in my Gamo magnum and never found one that had achieved any form of expansion when I dug them out of bunnies. I've found Crosman HP can give good accuracy and I'd buy them for that reason but not because I think they're any better for hunting.
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Posted By: kruzaroad
Date Posted: 15 May 2023 at 9:38am
From what I've seen and checked on reviews I don't think springers really have the omph to get good expansion.
Your never going to get the expasion of what cartridge rifle will do due to the volicity dropping so quickly.
Accuracy has always been the mantra of air guns for pest control.
Expansion rates in gel arnt that applicable as its not an accurate medium for small game.
However the expansion when hitting steel catch boxes seems to be pancake like in my experiance.
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Posted By: dvlnme
Date Posted: 15 May 2023 at 2:06pm
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kuzzaroad is correct on this one you need velocity to make a soft lead hollow point bullet or pellet to expand reliably,accurracy is the key wih airguns,its generally accepted by lead bullet shooters using firearms with hard cast bullets or soft lead swaged bullets that it takes close to 1000fps on target to get any lead projectile to expand reliably in flesh,they may doso if they hit bone but not allways,a pcp rifle firing soft lead hollow point bullets at over 1500 fps at the muzzle is a very differnt thing to a pellet gun firing pellets at under 1000fps,and most accurate airguns are under 1000fps,i have been shooting all sorts of lead bullets out of firearms for lot years and done lot hunting using lead bullets in firearms and pcp airguns,and i can pretty much garrentee hollow point pellets except for polymag type pellets never expand in small game at airgun velocitys a domed pellet hitting small game animals at anything over 700fps will do a lot of damage evan in 177 cal with a head shot its instant lights out on rabbits possums etc,having tryed most hollow point pellets in 177/22 cal none ever expanded until they hit the ground behind the target except for polymags at airgun velocitys but surprisingly sometimes hollow point pellets can more accurrate than domed pellets,so you pays your money and takes your choices eh,just find the most accurrate pellets for your guns is allways the best choice for hunting or pest shooting. cheers mike
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Posted By: flock
Date Posted: 15 May 2023 at 2:21pm
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Did wak a starling at 20 yards, with a 16g hades would have had an impact speed of 950fps, that was impressive, went down like he been hit with a 17hmr.
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