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Ever have a tank split while filling

Gosh, I haven't thought about that stuff for years! There was always something really weird about that stuff.
Heh, worked fine on radiators back in the old days, not sure I'd try it on the newer ones but if one must to get you through a short period then live dangerously. Somewhere up in my brain cell is what the stuff was they put in it to plug the hole. I want to say coconut fibers.

HW/Weihrauch  HW95K adjustable

It's a neat feature on the stock. The 95 does not need much more height in the cheekpiece for a reasonably sized scope. And good cheekpieces are easy to come by. So I'm not sure it's an earth shaking development. It will help guys using giant scopes to get better cheek weld and I suppose that's an added value.

The stock modification that I feel is needed is the grip/palm area. The HW rifles are all way too slender. The proper finger position on the trigger is impossible. Even on the thumbhole stocks. The grip area seems to be designed for a child.

I paid extra for a walnut stock and I'm hesitant to wrap an inch of tape around it to get good ergonomics. If they had included this much needed design change into the stock it would be great. Sadly the photos look like the grip is as skinny as ever.

I think they should offer a synthetic stock like the blackline on the 95. I would buy one in an instant. A nice fat grip area you could feel in your palm would be great. At least if you wanted to put a roll of sports tape on the grip to get it to fit you could do that without ruining the look of the wood stock.

They are great rifles and this looks like an answer to a problem they didn't really have. It's a cool feature and many guys will love it. But IMO it sidesteps the obvious stock change that would make a real difference in ergonomics.
So you like a fat around the grip area.? Thicker ,or more set back.. I personally like very thin from front middle finger to thumb if I don’t make a thumb plate.. IE,WEATHERBY style. Usually with a bit of inner palm swell.
My 95 pattern will be that. I always make them oversized for baseball mitt hands. You can take it off but ,can’t put it on.
Another fine
Wierdrock design :rolleyes:

Anxious to see A.G.R. stock (y)
It will be Sporter Roll over design. Maybe thumb plate. I’ve toyed the thumb hole idea but it’s just not my sandbox.
I think the stock looks pretty good for factory. It has stippling which is a nice touch, and I like the adjustable cheek piece as well.
I dispise stipling. Pressed Checkering is second.. I’d rather have a well fitted bald stock.. That being said, I believe a stock isn’t finished until checkered. It makes them in many ways.

Milton is coming, but there's still time to pick up a great deal on an airgun!

Sarasota, the eye went right over the house basically. We were boarded up and out of state. Somehow this 1951 bungalow survived.

View attachment 503856

View attachment 503857
Glad you are safe and your house is intact. Apparently they knew a thing about construction in the late 40's and early 50's.

Tuning  HW35 Tuning

Some of the early 35's suffered from poor brazing (cylinder plug to main tube) here.....

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.....which creates a huge amount of lost volume, or in other words horribly low compression ratio (on a rifle that already has a very low comp ratio). Im not saying this IS causing your results, but if yours is suffering from this you'll struggle to make 7-8ish fpe no matter what tuning is done.

If it does have this issue it can be resolved by thoroughly degreasing the cylinder, bunging up the TP, squirting a thin loctite around the join, and then holding it under either compression or vacuum (with the piston) so the air in the void is replaced by the loctite. It doesn't need de brazing as per my pic, that's just an example from a 25mm conversion I did on a leaky 35 a while back. All the best.....

N/A  Whats your most consistently accurate airgun?

I got home late yesterday. Second cold shot this morning. Again at 50 yards. No site in. Just load and shoot.
A little low. Probably me, maybe the pellet, I kind of doubt the gun though, but won't rule it out.
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If time allows, I will try to get shot three tomorrow before I head out for the next job.
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I dont trust you. (When buying in classified)

I’m starting to a pattern here with the OP and the classifieds. Maybe it’s not good fit for you.

Huben  Anyone using the Huma GK1 regulator

If I'm not mistaken they made the regulator for the UK market. They have a really low power allowed for pistols (6ft/lb) and with that power level the regulator allows for hundreds of shots with minimal spread with a single fill.
Its pointless for good power levels because there is no space for a plenum.

Smooth twist barrels. Revolutionary new barrels.

All 3 of my guns have Original Smooth Twist barrels. Unbelievably accurate PELLET barrels! Most people these days want the option of shooting slugs, hence a fully rifled barrel. Slugs need a fully rifled barrel for spin stabilization. Pellets (Diabolo shape) are aerodynamically stabilized. Years down the line with my guns & I'm still amazed how accurate OST barrels are.

Selling asking buyer to pay pp fees.

Yeah people like you and 90% in here asking for buyer to pay the fee. That is the problem. It is against TOS for sellers to ask buyers to pay the fees or ask for friends and family. One, you ain't my family, 2 you the seller pays the fee. It's that simple. I made this thread cause I am tried of seeing folks in the classified asking buyers to pay the fees when rules is, SELLER PAYS THE FEES. smh.

Ps: might want to look up paypal TOS b4 using it. That's my advice.
Of course you could have followed the sellers instructions on how to pay. If his terms are not agreeable to you move on.

Optics  SOLD Discovery HD 4-24X50 FFP MRAD Scope

Listing includes Sig Sauer cantilever 20 MOA scope mount, After market Throw lever and After market scope capes. Scope comes from the factory with a sun shade and high scope rings. Tube size is 34mm and reticle is illuminated. Scope is in like new condition.Have the box and all of the factory accessories. Parallax goes down too 25 yards. If you don’t want the Sig scope mount. I Will reduce the price by $70.00. PayPal F&F NC. Other wise add 3%. Shipping is include in the price. $250.00

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Snowpeak  Snowpeak M16 Barrel breech thread

I do not have a M16 (yet, I want one in 177) so I don't know but if I had one and wanted to know I would measure the OD with digital calipers (set to metric and assuming a little clearance) and then use a thread pitch gauge to get the thread pitch. The latter are inexpensive and very handy. I use the one in my set of taps and dies. I'm sure Amazon would sell you a metric thread pitch gauge for a few dollars.

I dont trust you. (When buying in classified)

I've sold many guns on here and if someone is like that your better off not dealing with them. If it starts off with a negative attitude no saying it will get better. I had 1 guy who was hesitant on a gun years ago, ended up buying it and then he took it apart, caused a leak and then blamed me for selling him a leaking gun, then apparently the reg stopped working good after that. He was going to post how I was deceitful and sold him a bad gun so I paid for oring kit and reg and said never again will I deal with someone like that. That was one of the first guns i sold and didnt want my name to be tarnished. But I sold many more since and never had a problem. Nice thing is you get to choose who to sell to. Like a restaurant or store we have the right to refuse service to anyone.

HW/Weihrauch  HW95K adjustable

It's a neat feature on the stock. The 95 does not need much more height in the cheekpiece for a reasonably sized objective lens and good cheekpieces are easy to come by. So I'm not sure it's an earth shaking development. It will help guys using giant scopes to get better cheek weld and I suppose that's an added value.

The stock modification that I feel is needed is the grip/palm area. The HW rifles are all way too slender. The proper finger position on the trigger is impossible. Even on the thumbhole stocks. The grip area seems to be designed for a child.

I paid extra for a walnut stock and I'm hesitant to wrap an inch of tape around it to get good ergonomics. If they had included this much needed design change into the stock it would be great. Sadly the photos look like the grip is as skinny as ever.

I think they should offer a synthetic stock like the blackline on the 95. I would buy one in an instant. A nice fat grip area you could feel in your palm would be great. At least if you wanted to put a roll of sports tape on the grip to get it to fit you could do that without ruining the look of the wood stock.

They are great rifles and this looks like an answer to a problem they didn't really have. It's a cool feature and many guys will love it. But IMO it sidesteps the obvious stock change that would make a real difference in ergonomics.

I dont trust you. (When buying in classified)

I think all this (over and over and over again ) talk is building a no trust atmosphere here where before all this talk , it was a trusted site .
I would hope that if a deal just go's south you should not publish it , on the other hand if you get scammed for real then it is time to publish Facts .

I dont trust you. (When buying in classified)

It's probably best for you he pulled out. I've gone through things with a prospective buyer or two who gave me so many red flags I refused to sell to them.
I was polite and told them they'd be better off buying from an actual retailer.

I dont trust you. (When buying in classified)

On one hand, I'm not...an overly trusting person.

BUT, on the other hand, if you want something that is for sale...you have to put yourself out there and "man-up" and send the money.
I'm not part of PayPal, so I really...have to just grit my teeth and send the check (IF the seller will accept a check).

Only one time since eBay opened, have a gotten the proverbial...shaft. And it was a small shaft. I received the item (four car wheels), but they were not...the size as indicated in the add.

Mike

P.S. - I should have added -

IF...either person doesn't get a good feeling after either or both, personal e-mails (from the site, or to the others computer), or phone calls...call the transaction off, simple !

I've called off cylinder head work, when I didn't get a good feeling of what was expected of me and my work.
Like - Customer - "Am I gonna gain 150hp ?" Me - No you are not. Customer "why not ?". Me - "It's just not possible". Customer - "why can't you, so and so did on "X" heads". Me, sorry, I can't help you with your needs, good by".

Has anyone fired projectiles at slower speeds to help determine the accuracy at longer distances?

There is the story of the Experimentalist and the Theoretician, both on death row facing execution...
Ballisticboy is the experimentalist! I'd be interested in his actual measurment of spin damping.

Anyway, as I understand it, spin is damped in flight by air resistance or drag across the circumference of the pellet/slug, similar to what slows the pellet in its flight path but in the roundabout direction. We can calculate the approximate rotational velocity of the surface of the pellet/slug when it leaves the barrel, and compare that with the flight velocity. We know how much the flight is slowed by drag, and we know that drag increases with the square of velocity, so if the rotational velocity is similar to the flight velocity, it might slow down similarly, and if it is less then it slows down much less.
Let's take those Javelin 40gr slugs as an example. They are 0.217" in diameter. Circumference is pi*diameter, so 3.14 * 0.217 = 0.68" around. If it was spinning at 780rps when it left the barrel at 1040fps, then the surface would be spinning at 0.68 inches per revolution * 780 revolutions per second = 532 inches per second or around 44 feet per second. That also can be calculated (as a confirmation) by the twist rate, 1 in 16, where 1040 feet per second times 12 inches per foot / 16 inches per twist gives 780 twists per second or revolutions per second. And then it fits into the calculations preceeding to give the 44fps.
That all is very slow relative to the flight speed. I wouldn't expect the rotation to slow much as drag is low at that speed.

Mike
It was Harry Fuller in Australia who measured the down range spin rates using the method I described earlier. He used 0.25 JSB King pellets fired out to 200 yards at 890 ft/sec. I just used his data to obtain the spin damping. Spin damping moment coefficients are very small but so is the spin inertia of a pellet

As for Matt Dubber, this is one of his better ballistics videos. He starts out on the right track, but then looses his way somewhat in getting hung up on crosswinds, and missing the root cause of the spirals. Crosswinds can induce spirals, but they are not the basic reason pellets spiral. The actual problem appears to be the increase in yaw wave lengths, which increases the heave and swerve amplitude to the point where the pellet gets visible spiralling. The lack of dynamic stability of pellets doesn't help either, as it provides the increasing yaw angles which help to cause the heave and swerve.

Spin damping is related to the skin friction drag, not the total projectile drag. On a pellet the largest drag contribution is the base drag followed by the nose form drag at high speeds. The skin friction drag is a relatively small part of the total.

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