Airgun advice?

[KenGMac]

Could well be wrong on that though.

No not an incorrect statement at all, Dieseling is a fact, that any "petroleum / Oil" based product, Oil, Grease, will cause a very large increase in the speed the pellet leaves the weapon.

I have seen an Air Rifle undergo a [non Dieseled ] test and it was rated at 10.6 Foot pounds a few drops of [in this case 3 in 1 Oil was added to the breach, behind the Pellet the weapon tested and its power had moved upwards to [about] 17 Foot Pounds. i cannot recall if it was a 0.22 or 0.177?

Any air weapon over 12 Foot pounds will have to be registered and a Fire Arms Certificate obtained [if possible] bottom line is that if you are found with an air weapon that produces anything above 12 Foot Pounds that is a Firearms Offence, if you do not have it registered and hold an FAC, for the weapon.

Ken.

 

[d000hg]

Foot of water in base of dustbin and lace a ramp up too top with bait, screw a narrow baton to inside just below the rim and grease it, extra bait on it. Rats are greedy and will fall in trying to get food.

As I say, they are smart... they are simply not going in the trap we have even after more than a week.

The drowning method is (according to online research) a bit error-prone (rats are smart) and also not particularly humane. You also have to deal with a bucket full of dead animals. I saw someone using one on Youtube in their barn and thought it hadn't caught anything, only to realise the water was just dirty and there were several submerged.

We also need to ensure traps are safe from our chickens either being hurt by them or setting them off all the time. I hoped the chickens would attack the rats but they don't seem bothered. Waiting outside with the gun seems the better option I just need to put in the time. Maybe the weather will be good at the weekend

 

[Brigadier]

No not an incorrect statement at all, Dieseling is a fact, that any "petroleum / Oil" based product, Oil, Grease, will cause a very large increase in the speed the pellet leaves the weapon.

But Ken, is it through ignition, or through vaporisation?


Edit: another idea.
Vaseline / 3 in 1 / whatever gets seriously squished when the piston slams forward, causing it to heat up (a lot).
Thus, seriously increasing the overall pressure behind the pellet, above and beyond that if just fresh air is present, and squashed.
Possibly?

 

[Tigercubrider]

Rats are very suspicious, probably because everyone's been trying everything to kill them for thousands of years. So a "new item" on a route is avoided for quite a while until it becomes familiar. Peanut butter is a tempting bait but you need to ensure that other animals don't get trapped

 

[Brigadier]

"Lubricating oil combustion in the compression chamber of a spring-piston air gun has a significant impact on the internal dynamics and on the performance of the gun. Using a well-known hydrocarbon (n-octane) as a proxy fuel for the lubricants that cause dieseling, this analysis reveals that a spring piston air gun responds to dieseling by delivering higher muzzle energy to the projectile in a non-linear relationship with the amount of fuel burnt - the grater the amount of lubricant burnt, the less efficient the transfer of combustion energy to the projectile. Dieseling causes substantial rises in peak temperatures and, depending on the ignition characteristics of the fuel, it mal also cause significantly higher pressure peaks within the compression chamber. For typical operating parameters, computations suggest that practically all the hydrocarbon is consumed before the projectile undergoes any significant movement within the barrel. Combustion happens extremely fast, with all the available fuel (or oxygen in a rich mixture) being exhausted within a small fraction of a millisecond."

https://www.researchgate.net/public...#:~:text=When the piston seal or,firing cycle.

 

[KenGMac]

The interesting bit is that the Volume of "OIL" is very small but the effect is Large on the M/V and Foot pound produced.

if you consider it, how much "OIL" can you get behind a pellet in a breach?

Ken

 

[Brigadier]

The interesting bit is that the Volume of "OIL" is very small but the effect is Large on the M/V and Foot pound produced.

if you consider it, how much "OIL" can you get behind a pellet in a breach?

Ken

Problem is, apart from being illegal, the inconsistent muzzle velocity would make accuracy effectively non - existent.
Which would render a. 177 or. 22, even approaching 20 ft lbs, pointless.

 

[KenGMac]

There are a lot of shooters that have actively sought out and are using Air Weapons that have a FAC? they are on sale commercially, and are accurate?

As I understand it?? it is cheaper to have a PCP giving [say] 5 shots at possibly well above 20 Ft. lbs. rather than using a rim fire .22 or .223. Also an air weapon is easier to "Silence" than a rim fire and a load easier than a center fire, It is also possible that an air weapon needing an FAC will be cheaper to run than a rim fire .22 with [good quality] ammunition at £ 8.50 / 50?

As an aside in America [where else] there are a load of people that have 50 cal air weapons, and In South Africa they hunt wild bore with 50 cal air weapons, needless to say these weapons are well above 12 Ft. lbs.

Ken.

 

[EddieM]

Problem is, apart from being illegal, the inconsistent muzzle velocity would make accuracy effectively non - existent.
Which would render a. 177 or. 22, even approaching 20 ft lbs, pointless.

Air rifles have a use, but like anything if you try to mess with it's operating parameters, you're using the wrong tool. Time to get (apply) for a FAC and get a proper. 22 rifle.

 

[KenGMac]

Why not go all out?

Go for a 0.308 the thought still scares me, I cannot get used to that slight but very noticeable vision distortion when you release the trigger, drawback, lack of ranges, cost of a round [last time I looked] about £ 1.00 + / bang

Going back to the FAC air weapons, these things are not just a 12 Ft. Lbs. weapon Tweaked, rather they are purpose designed for the job, I have heard it said that the recoil from a FAC, PCP is easier to handle and account for. Certainly the recoil from a 0.308 [for anyone reading this and is new to this sport a 0.308 is the "Sporting" caliber of the 7,62. mm round] is not ever, ever to be underestimated.

Ken.

 

[Brigadier]

Air rifles have a use, but like anything if you try to mess with it's operating parameters, you're using the wrong tool. Time to get (apply) for a FAC and get a proper. 22 rifle.

Not me, EddieM ; I was quite happy with the weihrauch, and the pleasant target shooting in me mam's garden (and field beyond)

 

[foxhole]

 

[Lower]

I've been using H&N Barracuda Hunter pellets recently. Its a hollow point pellet and i've found it particularly effective in taking down pigeons. I assume the design means it flattens on impact and its taken the head completely off a couple of pigeons.

 

[d000hg]

Looks actually quite nice although we have the added complication we do not want to kill squirrels - we're in woodland and there a lot of them causing nobody any problems. So positioning traps, especially lethal ones, is important. I like the humane nature though. The lack of any kind of off-switch is a bit worrying, as is the end of the video about eating the rats...!

I wonder if those are standard CO2 canisters like you use for homebrew, not some weird fitting?

I happened to watch a Demolition Ranch youtube video about a .50 airgun today, by sheer coincidence. Pretty nice.

 

[Brigadier]

I've been using H&N Barracuda Hunter pellets recently. Its a hollow point pellet and i've found it particularly effective in taking down pigeons. I assume the design means it flattens on impact and its taken the head completely off a couple of pigeons.

It's been almost thirty years since I did my shooting, so this may be myth from the mists of time......

Hollow points supposedly hit the target, and squashed a small volume of air into it on impact. The expansion of the air caused greater shock in the target, so improving the kill likelihood.