It would be very interesting to see this gun shooting .22 or .224 cast bullets.
Quote from: rkr on March 19, 2019, 08:57:44 AMIt would be very interesting to see this gun shooting .22 or .224 cast bullets.Not on full auto, it would be a waste of ammunition made for long range accuracy.Speaking of ammunition, in spite of the fact that I made a new breech with a better designed double detent, the inconsistency in shot size is still causing problems. if two sequential rounds are undersized, the probe will tend to jam the second round against the magazine opening. Looks like I'm going to have to find a way to sort the shot, more to come.
If it works on full auto it would work on semi-auto, just fix the trigger unit. .22lr LW barrel is 120 eur and .223 LW barrel 140 eur, why not give it a go? They say new Evanix semi autos get good accuracy and they use the same operating principle to my knowledge. Bullets are less prone to damage when loading and you can adjust the hardness when casting.
Are you seeing any shoot-down? Or are you just mitigating the shoot-down by keeping the bursts short?
What do you mean by "shoot-down"? The regulator not being able to keep up with the flow? I can more or less empty the bottle (at least until the pressure reaches regulator output pressure) in one continuous burst without ammunition.
total success from what I can see....
On a larger bore, in principle , the semi or full auto action would be easier to achieve due to the surface area of the bolt itself. ( aside from a transfer port blowoff assisting the hammer ).
a .375 slingshot steel ammo version would be pretty scary..
Thanks!Quote from: Rob M on March 23, 2019, 09:23:28 PMOn a larger bore, in principle , the semi or full auto action would be easier to achieve due to the surface area of the bolt itself. ( aside from a transfer port blowoff assisting the hammer ).Indeed, you'd also need a larger valve seat for a larger bore, though being balanced the hammer force increase needed would be exponentially lower than the force available to recock the bolt. Quotea .375 slingshot steel ammo version would be pretty scary..In full auto it would be a little pricey to run in terms of air and ammunition, but I would like to make something like that a semi-auto plinker.I have an idea for a "probeless" design, where the air cocks a smaller diameter hammer directly and during firing, the barrel is sealed by the next round in the magazine that is held in place against the pressure by a pawl:Naturally it would only work for hard spherical ammunition.
it could get pricey.. unless you were reusing the steel balls.. here they can be had at 2 cents a round
a semi auto version might be practical .the oringed hammer idea was on my old paintball gun..I converted it to 30 caliber pellet , but the results were dismal ( 290 fps w 45 grain )
Now you are getting close to Steyr. Add a spring loaded bar type magazine that's indexed by the hammer and you got it. Alternatively a belt feed could be used like in Umarex CX4 and few others.
It should be easy to adjust the vent to the hammer with a screw choking off the flow.... to make tuning easy....