7.62x39 Expansion In Water At 100 Yards
-
- Posts: 214
- Joined: 18 Feb 2016 23:31
- Location: New Rawlins, WY
- Has thanked: 212 times
- Been thanked: 102 times
7.62x39 Expansion In Water At 100 Yards
Did water expansion tests at 100 yards with some 20 year old China Sports 123 grain soft point
that groups well in my Mini-30.
Also tested Monarch 123 grain HP polymer coated.
Rifle used was my CZ bolt action. Both brands group well in the CZ.
The water buckets look bigger in the rifle scope.
The first shot of each brand of ammo was fired into the target to the right of the buckets
to determine the ammo's relative zero.
Then the expansion shot was fired into the buckets' 5 inch square cut out.
The 5 inch squares were cut out of both the front and back of each bucket,
allowing the bullets to impact the water bags without going through the buckets' hard plastic.
The hard plastic can limit expansion.
Each bucket contained a plastic bag filled with water (because the buckets had the 5 inch cut outs).
The China Sports expanded well, with 103 grains retained weight.
The casing and copper colored jacket would stick to a magnet, the lead colored core would not.
The ongoing China Sports corrosion test looks good so far,
but going to give it another couple of days before proclaiming it non-corrosive.
No expansion or weight loss by the Monarch.
The hollow point was not clogged.
that groups well in my Mini-30.
Also tested Monarch 123 grain HP polymer coated.
Rifle used was my CZ bolt action. Both brands group well in the CZ.
The water buckets look bigger in the rifle scope.
The first shot of each brand of ammo was fired into the target to the right of the buckets
to determine the ammo's relative zero.
Then the expansion shot was fired into the buckets' 5 inch square cut out.
The 5 inch squares were cut out of both the front and back of each bucket,
allowing the bullets to impact the water bags without going through the buckets' hard plastic.
The hard plastic can limit expansion.
Each bucket contained a plastic bag filled with water (because the buckets had the 5 inch cut outs).
The China Sports expanded well, with 103 grains retained weight.
The casing and copper colored jacket would stick to a magnet, the lead colored core would not.
The ongoing China Sports corrosion test looks good so far,
but going to give it another couple of days before proclaiming it non-corrosive.
No expansion or weight loss by the Monarch.
The hollow point was not clogged.
You do not have the required permissions to view the files attached to this post.
- Ranch Dog
- Site Admin
- Posts: 9399
- Joined: 23 Jan 2012 07:44
- Location: Inez, TX
- Has thanked: 1838 times
- Been thanked: 2281 times
- GasGuzzler
- Moderator
- Posts: 2753
- Joined: 02 Nov 2015 19:54
- Location: Cooke County, TX
- Has thanked: 310 times
- Been thanked: 453 times
Re: 7.62x39 Expansion In Water At 100 Yards
Looks like fun.
Did they go all the way into the sand?
Did they go all the way into the sand?
__________________________________________________________________________________________
I've always been crazy but it's kept me from going insane.
I've always been crazy but it's kept me from going insane.
-
- Posts: 214
- Joined: 18 Feb 2016 23:31
- Location: New Rawlins, WY
- Has thanked: 212 times
- Been thanked: 102 times
Re: 7.62x39 Expansion In Water At 100 Yards
The first ammo tested was the China Sports SP that expanded nicely.GasGuzzler wrote:Looks like fun.
Did they go all the way into the sand?
The projectile was found in the second bucket of water.
It did not penetrate into the third bucket of water or go in the sand.
The shock wave from the expanded soft point destroyed the first bucket.
Next was the Monarch HP that did not expand.
It was shot through the two remaining buckets and was found in the sand.
Interestingly with the non-expanding HP, the first bucket remained intact
but the shock wave destroyed the second bucket.
The length of each bucket of water was 10 inches.
- HarryAlonzo
- 500 Shots
- Posts: 990
- Joined: 31 Dec 2015 00:20
- Location: Sedona
- Has thanked: 248 times
- Been thanked: 282 times
- Ranch Dog
- Site Admin
- Posts: 9399
- Joined: 23 Jan 2012 07:44
- Location: Inez, TX
- Has thanked: 1838 times
- Been thanked: 2281 times
Re: 7.62x39 Expansion In Water At 100 Yards
HarryAlonzo wrote:Tell us about your cat(s).
Someone would think the same of me. I buy the stuff in 5-gallon buckets as well but to clean up the messes my tractor and implements leave on my barn floor.
Michael
-
- Posts: 214
- Joined: 18 Feb 2016 23:31
- Location: New Rawlins, WY
- Has thanked: 212 times
- Been thanked: 102 times
Re: 7.62x39 Expansion In Water At 100 Yards
.
Square buckets work better than round buckets.
With round buckets, often the projectile slows down in the water
and bounces off the curved surfaces of the 2nd and 3rd buckets.
If the projectile lands in the grass, it's lost forever.
Out of the three square buckets used for these tests, only one can be used again.
The two kitty litter buckets were torn up beyond repair.
.
Square buckets work better than round buckets.
With round buckets, often the projectile slows down in the water
and bounces off the curved surfaces of the 2nd and 3rd buckets.
If the projectile lands in the grass, it's lost forever.
Out of the three square buckets used for these tests, only one can be used again.
The two kitty litter buckets were torn up beyond repair.
.
You do not have the required permissions to view the files attached to this post.
- HarryAlonzo
- 500 Shots
- Posts: 990
- Joined: 31 Dec 2015 00:20
- Location: Sedona
- Has thanked: 248 times
- Been thanked: 282 times
Re: 7.62x39 Expansion In Water At 100 Yards
True enough, kitty litter is the best inexpensive oil absorbent there is.
But I miss my cat.
I want to know why Lowkey needs 5 gallon buckets of sildenafil citrate.
But I miss my cat.
I want to know why Lowkey needs 5 gallon buckets of sildenafil citrate.
- Ranch Dog
- Site Admin
- Posts: 9399
- Joined: 23 Jan 2012 07:44
- Location: Inez, TX
- Has thanked: 1838 times
- Been thanked: 2281 times
Re: 7.62x39 Expansion In Water At 100 Yards
I figured you would ask! I guess he is a busy fellow.HarryAlonzo wrote:I want to know why Lowkey needs 5 gallon buckets of sildenafil citrate.
Michael
- akuser47
- Founding Member
- Posts: 5070
- Joined: 12 Feb 2012 11:43
- Location: ohio
- Has thanked: 1266 times
- Been thanked: 482 times