Air Stripppers

[sawtoothscream]

Really see no difference with my 2240, about teh same size group with or without. 

On the discovery it throws the pellets right into the dirt,  removed it instantly as the gun around shoots great at my hunting ranges

[Gerard]

Okay, so perhaps a bit of an apples and oranges thing going on, depending on the intended use. Still, my K12 has rifling same as any other good barrel. It's a hammer forged Pardini barrel making it one of the most precisely made, as the company has a stellar reputation for barrels among Olympic level shooters. Recoil isn't an issue because the tungsten cylinder being blown backwards from the breech as the moment the pellet is being blown forward cancels all recoil when correctly adjusted to a given velocity and pellet type. The air stripper has nothing to do with recoil, everything to do with managing air flow before, during, and just after pellet transition. It's adjustable, and I've played with it a fair bit, settling on the spacing which gives me the smallest groups. I've seen those groups open up considerably, as much as 20%, when the cone is in the wrong place. But groups actually open up even more than that if I clean my barrel, something I did at about 2,000 shots when I first owned the pistol. It took almost 100 shots for group size to close up again. Leading in for consistent lubrication seems to have been important in this case.

Many tests have demonstrated that the finest air pistols and air rifles from the same companies (Steyr, Pardini, Feinwerkbau, etc.) show either no difference in group sizes at 10 metres or a slight advantage to the air pistols. Of course with these examples of shorter barrels we're still looking at a minimum of about 8.5", and usually between 9" and 10", so not really very short. And the velocities involved are usually in the 480fps to 650fps range, with most of the pistols between 480 and 570fps. The rifles tend to be tuned a bit faster to keep the barrel time to a minimum. Shooting faster than these speeds tends to destroy accuracy. I imagine it must be a very different thing for bench rest, where much longer ranges are involved and therefore much higher velocities? So perhaps leading in the rifling quickly becomes problematic because of this higher velocity? Doing a bit of Googling it seems velocities are typically in the 850 and higher range, but I didn't search exhaustively. That alone would easily explain the need for constant cleaning. The higher the energy the more likelihood of leaving partially melted lead in the grooves.

[rsterne]

Absolutely, the difference in velocity between a match pistol and a benchrest rifle makes any comparison of barrel leading useless, IMO....

Bob

[michaelthomas]

Gerard,

LV class typically will shoot 8.4's at 795. (12fpe max)
HV class typically will shoot 10.3's up to 920, or 13.4's up to 815. (20fpe max)
Open class typically will shoot 16's or 18.1's between 850 and 935. (35fpe max)

With a 1:18 twist barrel you are spinning up the pellet to about 30,000ish rpm in 24 inches. 

I would be willing to bet that I could get your pistol to shoot just as well without the stripper.

Mike

[Job]

These brakes (air stripper) can be custom tailored to meet your specific needs. 
http://www.blackrose-tactical.com/product-category/muzzle-brakes/

[Tofazfou]

I have one on my TD257 because i knew i would be moving a lot of air while shooting cast bullets.  My gun started out at 900 FPS with a 70-74 gr bullet.  I also did it for LOOKS.

Now, i have NOT done any extensive research on the subject of whether it works BEST WITH and/or WITHOUT a stripper but my gun has been accurate in both configurations.  A SHROUD/LDC is a stripper also.  I don't think there is as much air coming out of the end of a SHROUD/LDC because its all either rerouted or deflected inside of multiple chambers.  And everyone seems to NEED one of those and their guns produce great accuracy.  And i'm sure the gun is just as accurate without.

The 1 thing i have noted/noticed with my TD257 and the HATSAN Air-Stripper is there is definitely a POI differencce with and without it on the gun.  AND YES, IT TAKES SOME ADJUSTMENTS to get it right!

I would be nice to see some HS camera footage like shown above of WITH and WITHOUT as well as a well written/documented post showing results.

I elect BOB STERN.......lol (he is gonna kill me.....lol)

[rsterne]

hrvoje.... Those are muzzle brakes, NOT air strippers.... total different concept....

Cedric.... nomination respectfully declined.... 

Bob

[Ribbonstone]

The little bit of playing with them that I've done hasn't proved they did much for me.  Perhaps better rifles, better shooter, better barrels, etc.

Whe I did think I got a positive result (not by much) I ended up making a "blank" stripper...same sweight, same length, same attachment, just drilled too large to really have any effect .  TUrned out the same rifle seemed to shoot as well with the blank as the stripper.  So I wrote it off to weight vs. barrel harmonics.

Only strippers that get my attention now also serve drinks.

[Mod90]

oh no you didnt just take it there   

[Sfttailrdr46]

oh no you didnt just take it there   

[Job]

hrvoje.... Those are muzzle brakes, NOT air strippers.... total different concept....

Cedric.... nomination respectfully declined.... 

Bob

Three or more bafles in muzzle brake not removing turbulent air from around the pellet 
tnx for declined