Can someone give me guidance on what is happening in this pic?

[MoHobbyPlinker]

My brother was sighting in his 30-30 at 100 yds and then tried from 50 yds since that is closer to the distance he hunts from.

All the shots shown are the same caliber from the same 50yd distance. Shot one and three were stopped. Shots two and four went straight threw the 1/4" hardened steel. The still is from a metal manufacturer from in town but not specifically designed to be ar500 rated steel. We have been shooting this same target for 5+ years hitting it with everything in our arsenal without any problems until now.

 

[TheHorta]

Possibly you’re shooting black-tip without knowing it. Happened to me a couple of times. Hand-loads?

Also, 1/4” is pretty thin, even for AR500.

 

[higginsworksforme]

People don't think metal fatigue be like that, but it do.

 

[kindabitey]

50 yds is pretty damn close for anything 1/4", even new AR500.

 

[Drumie]

Work harding. I did that with a flipper target.

 

[Bullfrog08]

Quick Google search

 

[bill alexander]

If you look at the sheared out surfaces you will note that the surface is bright with minimal rear tearing. This is classical for adiabatic shear which occurs in hard plate when the strain rate (velocity) exceeds a certain limit value. The phenomenon is peculiar in behavior, very digital in determining V50 values and much heavier rounds with greater cross sectional energy will be stopped without much damage to the plate. It has overlap with the plate thickness ratio being 1:1 with the caliber but is not classical plugging of the plate.

Work hardening of certain steels like AR types (abrasion resistant mining plates vs true armor) will shift the onset.

 

[EddieNFL]

If you look at the sheared out surfaces you will note that the surface is bright with minimal rear tearing. This is classical for adiabatic shear which occurs in hard plate when the strain rate (velocity) exceeds a certain limit value. The phenomenon is peculiar in behavior, very digital in determining V50 values and much heavier rounds with greater cross sectional energy will be stopped without much damage to the plate. It has overlap with the plate thickness ratio being 1:1 with the caliber but is not classical plugging of the plate.

Work hardening of certain steels like AR types (abrasion resistant mining plates vs true armor) will shift the onset.

In layman's terms, the bullet bitch slapped the plate.

 

[sirhrmechanic]

.30-30 will go through mild 1/4 no problem.

I don’t think you got anything close to Ar500!!!

Here is a Piece I made for teaching hunter safety a few years ago. Shot from 25 feet. Showed
The kids in no uncertain terms that guns are not toys!

That is 1/2 inch mild steel. Note the .30-30 went well past 1/4”.

Sirhr

 

[higginsworksforme]

That is 1/2 inch mild steel. Note the .30-30 went well past 1/4”.

Wow good thing you stopped before 10mm.

 

[TicTacTex]

Those two rounds were military grade.

 

[sirhrmechanic]

Wow good thing you stopped before 10mm.

I shot a different piece with a 10mm. I didn’t want to scare the kids.

Cheers, Sirhr

 

[MoHobbyPlinker]

Possibly you’re shooting black-tip without knowing it. Happened to me a couple of times. Hand-loads?

Also, 1/4” is pretty thin, even for AR500.

idk if its exactly 1/4 or more but it seems around that much or more but definitely now 1/2". Maybe 3/8". I just asked what kind of ammo he was using and he said standard Remington deer hunting ammo

 

[MoHobbyPlinker]

Work harding. I did that with a flipper target.

we've done it with a flipper target with ARs before but that was bc the flipper targets were made for .22

 

[MoHobbyPlinker]

I have confirmed the ammo used was Remington Core-Lokt 30-30 win 170grain

and my dad who purchased the plate says it is 504 hardened steel

 

[sirhrmechanic]

I have confirmed the ammo used was Remington Core-Lokt 30-30 win 170grain

and my dad who purchased the plate says it is 504 hardened steel

Ah... 504 is a non-hardened stainless.

Doubt at all that it was 'hardened' after being sold.

Certainly 1/4" isn't going to stop even a medium-pressure .30.

Cheers,

Sirhr

Edit: Last time I cut 504 on a lathe it was like cutting copper. Or silly putty. Gummy as hell. No fun!

 

[Snipe260]

.30-30 will go through mild 1/4 no problem.

I don’t think you got anything close to Ar500!!!

Here is a Piece I made for teaching hunter safety a few years ago. Shot from 25 feet. Showed
The kids in no uncertain terms that guns are not toys!

View attachment 8250215

That is 1/2 inch mild steel. Note the .30-30 went well past 1/4”.

Sirhr

6.5 creedmore

 

[FredHammer]

Hunts at 50yds and even zero's a gun?

 

[sirhrmechanic]

View attachment 8250368
6.5 creedmore

^^^ Rectum of 6.5 Creedmoor shooter after a Saturday night "on the town' so to speak.. Not that there's anything wrong with that.

Sirhr

 

[Maser]

 

[Ronws]

^^^ Rectum of 6.5 Creedmoor shooter after a Saturday night "on the town' so to speak.. Not that there's anything wrong with that.

Sirhr

pic of the shooter

 

[sirhrmechanic]

pic of the shooter

View attachment 8250387

You forgot the Pumpkin Spice Latte...

Sirhr

 

[KYAggie]

Here’s some guidance. What you experienced shows the unpredictability of shooting steel that’s not AR500 type stuff. There’s quite a few YouTube’s of people shooting steel like this and you can hear the bullets coming back their direction; that doesn’t happen when you shoot AR500 steel at the proper distance. You never really know what’s going to happen with normal steel and shooting it can be hazardous to you health. Do yourself a favor and get some AR500 targets.

Like this famous one:

 

[MoHobbyPlinker]

Ah... 504 is a non-hardened stainless.

Doubt at all that it was 'hardened' after being sold.

Certainly 1/4" isn't going to stop even a medium-pressure .30.

Cheers,

Sirhr

Edit: Last time I cut 504 on a lathe it was like cutting copper. Or silly putty. Gummy as hell. No fun!

I just checked the website of the company he bought it from and he says heat treated plate so maybe my dad was confused.

Again we have been shooting this same plate for 4-5 years with nothing like this ever happening with these same guns before. I have hit it with green tipped 5.56 and hit it with my 6.5cm. My brother has hit it with his 30-30, 3.06, and 300 blk. I even found casing from someone shooting .458 socom out there. Nothings ever punched a hole until now.

 

[MoHobbyPlinker]

Hunts at 50yds and even zero's a gun?

He actually had the gun sighted at 100 but said most shots he makes seem to be between 50-60 yds so he wanted to see how different his aim would be at 50 yds instead of 100

 

[johnnycat]

.30-30 will go through mild 1/4 no problem.

I don’t think you got anything close to Ar500!!!

Here is a Piece I made for teaching hunter safety a few years ago. Shot from 25 feet. Showed
The kids in no uncertain terms that guns are not toys!

View attachment 8250215

That is 1/2 inch mild steel. Note the .30-30 went well past 1/4”.

Sirhr

Well, well, well. As if we needed more proof that .45acp is better than 9mm.

 

[sirhrmechanic]

Well, well, well. As if we needed more proof that .45acp is better than 9mm.

Yes, but steel plate doesn't have lungs! ;-)

Sirhr

 

[Ronws]

View attachment 8250400

You forgot the Pumpkin Spice Latte...

Sirhr

And penny loafers.

 

[armorpl8chikn]

"What is happening in this pic?"
Is this rhetorical or the lead up to a Polish joke?

Something punched two holes in your steel.

 

[acudaowner]

 

[Ronws]

"This is the kind of instant publicity that makes people!"

"I was born a poor black child."

 

[Keith E.]

idk if its exactly 1/4 or more but it seems around that much or more but definitely now 1/2". Maybe 3/8". I just asked what kind of ammo he was using and he said standard Remington deer hunting ammo

Core-Lokt, FTW!

Keith