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PostPosted: Fri Dec 09, 2005 8:56 pm 
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Location: ontario
can shoot through a 2x4? I have a buddy that used to have a .177 break barrel Slavia back in the 70's and from 10-20 feet it would shoot clean through a good sound 2x4. He can't remember which model it was because he doesn't have it anymore. I was wondering if you guys could tell me what model it could have been and then I could tell him. Thanks.

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PostPosted: Fri Dec 09, 2005 9:35 pm 
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Location: BC Canada
I don't know of any springer that can shoot through a solid 2X4. :shock: :shock: :shock:
The most powerful springer that you can buy will be lucky to get half way through.
Are you sure he is not using a CZ powder burner? :wink:
Maybe it is a gag. He split the 2X4 in half and lightly glue it back together and shot it with a Slavia 618 on the glue line. :twisted:


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PostPosted: Sat Dec 10, 2005 12:09 am 
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Wow, shooting through a 2x4 requires power. Back when I had the .177 Diana 52 I tried the 2x4 for penetration. Using 7.9gr Crosman Premiers I could just barely get through when the muzzle was 1" from the board. This rifle clocked at 1040fps with this pellet. The pellet would break through the wood on the far side but it was stuck with the skirt still in the wood. The CPL would not blowing completely through the spruce 2x4 from this rifle.

Todd


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PostPosted: Sat Dec 10, 2005 12:18 am 
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He must have used wd40 as lubricant in that baby :P


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PostPosted: Sat Dec 10, 2005 12:29 am 
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my guesstimate for .22 pellets like hobby 11.9 gr. to get the most penetration to go right thru 2x4,
you need a velocity like 1500 + fps. in about 10 yards distance.
Therefore for .177 7.9gr to go thru 2x4 perhaps you need about 1800 fps.


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PostPosted: Sat Dec 10, 2005 12:55 am 
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My Diana 52 was .177 caliber. With a lube tune (tar/moly) it clocked 1040fps with 7.9gr pellets. With the spruce 2x4 placed on the floor, and the muzzle placed 1" from the board, the pellet would almost make it through the board. The head would often stick out the back side of the board. The domed Crosman Premier Light pellet was used. Spruce is not a very hard wood and 1040fps should pop a pellet almost through 1.5" of soft wood.

I just tried my HW40 on a spruce 2x4. After 5 shots I got two to stick in the wood. The two pellets penetrated to slightly over 1/2 their length. The shots were taken 1" from the muzzle and JSB Exacts were used. A .22 pellet likely would not stick in the wood when moving at the same 380fps (more frontal area on .22).

I still have a 2x4 with pellets stuck in it from a .177 Webley Tempest. At 450fps the 7.9gr Crosman Premier would penetrate so the back of the pellet was flush with the surface of the wood.

Not every shot from my Diana 52 would go through the 2x4. When I hit a spot with no knots the pellet would almost blast through or would be just under the wood on the far side (over 1" penetration). A standard finished 2x4 is only 1.5" thick.

Todd


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PostPosted: Sat Dec 10, 2005 2:00 am 
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The problem with poor penetration is due to the soft lead pellets. They tend to deform and wedge themselves. It takes a lot of power to plow a soft lead pellet through a 2X4.
A hard pointy projectile that does not deform will do it with a lot less power. Wonder how well one of those Skenco sabot pellet penetrate wood? Sniper, you have some samples of those pellets. Any comments? TIA


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PostPosted: Sat Dec 10, 2005 2:11 am 
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The Crosman Premier is known to be a hard pellet. I wish I still had my Diana 52 so I could compare penetration of the Premier to the softer JSB Exact and also some pointed and wadcutter designs. I enjoy testing but I don't have the rifle anymore. Maybe someone with a healthy .177 Diana 48/52/54 or Diana 350 can test for us. Someone with a .177 PCP could set velocity around 1050fps and check penetration.

Let's all shoot some spruce 2x4 lumber and report results. :D Please state caliber, pellet used, velocity (if known), and depth of penetration. An opened paperclip can be used to check depth of penetration. Please use safety glasses and shoot from very close distance.

Todd


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PostPosted: Sat Dec 10, 2005 2:34 am 
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Hi Todd,
I would figured that if the pellet would stop at about 1" into 2x4, wouldn't it needs 1.5x more power or perhaps almost 2x at the beginning so that it can continue from that point on to drag the pellet all the way thru ??? since at that point power is already lost, perhaps at the time of impact power started to decrease.
What do you think ?


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PostPosted: Sat Dec 10, 2005 2:44 am 
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Hi Sniper,

I prefer to not "think" or "guess" on some matters. Doing the actual test will give the results. All I can say is that I saw the Crosman Premier pellet sticking out the far side of a 1.5" thick piece of wood (finished 2x4). The rest of the details are in the above posting. I only shot the Diana at one board so maybe I got a soft one. All I know on the penetration issue is what I experienced.

I would like to see some comparison testing with various .177 and .22 caliber airguns... shooting at various velocities (500fps to 1100fps).

Hmmm... I need sleep now. Good night bud.

Todd


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 Post subject: SLAVIA 620
PostPosted: Sat Dec 10, 2005 7:27 am 
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Location: French River, ON
I have only seen one powerful older Slavia air rifle - the Model 620.
The mainspring was 38 coils of .109" wire, 740" OD.
Piston ID .775", Guide OD .495".
The sear was on the side of the piston like the old Relum/FEG/Tellys and BSA Meteor, and the current B18/19 aka Quest 500/800/1000.
Nice solid steel two lever FEG type trigger that can be broken if the gun is oversprung with a heavy (.128" wire) mainspring
With cleaned and lubed leather seals, and a new BSA Meteor mainspring they will do close to 650 fps in .177.
With spacing, heavier spring, and piston weight, a harsh 700+ fps is possible.
A 620 might puncture a green 1"x 4" pine board, but not a 2" x 4".


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PostPosted: Sat Dec 10, 2005 8:13 am 
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When everyone is awake in my house I'll do some chrony testing and get some examples of 500 to just over 1000fps with JSB Exacts in .177 and from 465 to 787fps with JSB Exacts in .22 shot into a 2x4 from "X" distance. I'll post my results later on, this sounds like a fun experiment.

Mulby


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PostPosted: Sat Dec 10, 2005 9:02 am 
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Location: ontario
Thanks for all your answers guys. I don't want to think my buddy is lieing but I almost have to now. These were his exact words to me. "When I was a kid I had a Slavia .177 break barrel and it would go straight through a 2x4 easy from about 10-20 feet." I want to believe him but it's hard. I modded my 1377c and from 20 feet it's getting the pellet more than half way through a spruce 2x4. It didn't make it all the way but the board is a good sound one to. So the old Slavia guns that were pretty powerful were the 618 and the 620? When I go to the gunshow tomorrow I will look for either one and buy one of them and see for myself. thanks again guys.

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 Post subject: Not a 618
PostPosted: Sat Dec 10, 2005 9:20 am 
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Location: French River, ON
The only old Slavia that was powerful, that I have encountered, was the Model 620.
The Models 618, 622, and 624 were all 350 - 400 fps beginners' airguns.


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PostPosted: Sat Dec 10, 2005 11:11 am 
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Location: Southern Ontario
RM422, I think he could be telling the truth. I know for fact that in the early 70's there was a lot of airguns out there that had a lot of power. I had a Telly airgun in the early 70's that would bury a pellet way deep into a car tire shot from point blank and this same Telly when shot at about 30 yards would bury a pellet so deep into a 1/2" sheet of plywood that the back side of the board would be cracked by the pellet. This is TRUE !


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