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Taipan  Taipan Veteran bipod

Here is my pesting rifle; Taipan Veteran Long in .22 with the Accu-Tac PC4. The bipod is a bit weighty but I really like the functionality that the pan and cant lock completely and that there is also a separate lock lever for each. As a pesting rifle shooting out from a windowsill, I really like that I can traverse the rifle but still have the cant completely locked out.

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Diana  Chaser 25 cal CO2 Pistol in the Wild!

i got those .25 kits from Canada Shooting Supply today
quality is great and they bolt right on
the barrels are Bandit length and little over 9 inch
the one barrel i tried needed a little burr sanded off the port and dimple area
bolt is on right side and feels loose but i didn't fully install
i am thinking of buy 2 new .22 pistols and converting over
all i have but for owners it is a plug and play plus pellets

NAC Registration is on Feb 5th!!!

I registered today for this event. The website states...
"Registration and rifle sight-in will be on Wednesday April 17th from 12:00 PM to 5:00 Pm - We will be getting things going early on Thursday with a mandatory safety meeting at 7:00 AM." Based on last year, I had planned to be arrive on Thursday. Does anyone know what events they are going to do on Thursday, April 17th?

Crosman  Crosman 362 Anniversary Edition on Sale

My base model 362 was the least accurate air rifle I have ever shot. BB gun like groups. I cut my losses and sold it for 60 bucks. I have since bought a Legacy 1000 and Crosman sent me a 2100 because the 1000 ground it’s piston to dust in a day. Both of which are tack driver’s punching way above their price point. I hate to say it but if I really needed an anniversary gun I would buy the plastic legacy and lube the aluminum piston with a little white lithium grease before I ever shot it. Crosmans current plan of lubing with silicone to prevent dieseling at 12 pumps will gall the piston in a day. I cleaned all the powdered aluminum out of mine and the lithium has prevented any further wear on the piston.

Lens Caps for Ares ETR 3-18x50

I wanted to give you guys the courtesy of an update. I came into a pair of bikini covers that will take care of protecting my Ares lenses for the moment. Should I get caps, I think they will be either Butler Creek or MK Machining ones. The Vortex ones don’t look bad, either.

Again, thanks for the input. While I did not buy yet, I learned.
S7
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Crosman 1400 Scope Mounts

Thanks so much for the quick response.

Coincidentally, I had also sent an email out to BuckRail at the same time as I posted this here. He also got back to me in record time about 60 minutes ago. He asked for the barrel diameter (which is 14.32mm or .56"), stated he might have something that'd fit.

So now we wait.....and yes, definitely will post results.







JTS pellets - specs?

They did shoot 1/2” average groups at 50 yards for one outing, where I was testing them vs. JSB MRDs.

Tom
I did a similar test at 70y with about ten shots all touching.

The next day I ordered a full sleeve of the same lot. Subsequent testing resulted in those great shots 80-90% of the time. So my first couple 70y groups were lucky good.

I have not dug into sorting them to try and weed out flyers. My focus lately has been on .177 stuff and shortly, .30 stuff.

Arizona State Spring Piston championship - sponsored by Airgunners of Arizona

Today was a very fun shoot and I beat Tony T and won my 5 bucks back I lost at the Sonoran Classic😁 Sure was a lot of laughing and joking going on down the line....A mixture of PCP and Springers....Those of us shooting Springers are getting ready for Saturday which should be a fun time....Now it's time to grab some Advil 😎

Tony P.
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DonnyFL Tatsu Data

Whether we like it or not, it comes with the acoustic signature. It's what we hear. And yes, it's different depending on the environment.

Yes it does, but there is nothing we can do after the decompression to alter that acoustic signature. As you mention below the only time we can influence that is before decompression.

Here's the first set of bare shots with the time domain plotted in dBs. Is each pointy spike an echo? Could very well be. Why such a long tail? Is that a continuum of echos or something else? Interesting. First echo is @ 46ms delay, (~16m), next is roughly double that, could be a reflection. There's a couple of them. Then there's something distinct at 201ms delay (~69m). Using 344m/s for the speed of sound, for these calculations.
Temperature this AM was about 40 degrees. I am at sea level + 20 feet. The signature which shows up very clearly in the shots for the Tatsu at ~202ms after the uncorking are of the impact of the pellet on a cinder block 40 yards from the shooting position. It won't be in every shot. I wasn't trying to hit it. It was just yhere. The geometry is explained in the first post in this thread and includes an explanation of the timing of that spike. I didn't try to compensate much for temperature but used 1075 fps for the velocity of sound this AM (1050+temp(f)). I remember thinking when I picked the number it might be a bit low.

The uncorking event takes about 7.5 ms on most air rifles. That is the time from the pellet exiting the muzzle to the pellet getting down range a couple of meters.
sig-analysis-101-d.jpg

Stan's Posts here are very helpful in analyzing the uncorking and decompression events.

The moderator can't change the echos pursue, but it sure can reduce the signature of the main event, so all the echos are quieter, since the stimulus is quieter.

That is exactly correct. Almost ALL of that signal after about 7 or 8 ms is echo and harmonics in the physical structure of the gun. You can't alter it unless you alter it's source.

So lets think about what we are going to hear. First there will be the "tick" of the trigger, then springs and things decompessing and hammers smacking valves, and finally air venting down a tube pushing a plug. These things all generate harmonics in the gun. Finally (maybe 12 ms, 10 on a gun with a FAST lock time) we hear the uncorking even before there is much if any air exiting the moderator. All of these things are apparent in Stan';s posts. Then the pellet exits the moderator and a blast of air follows it in less than a millisecond. Uncorking is over and decompression begins. You can bound decompression by locating the point where the aggregate RMS peaks and begins to decline again which appears to be about 2 ms after the pellet exits the muzzle of the moderator.

So that is what we have to work with, everything we do we have to do in that 5 to 7 ms period between muzzle exit and 2 meters down range. After that we are hearing the echos and harmonics in the gun.

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