300 yards?

[jon_89]

I am looking to achieve a distance of about 300 yards. I cant make my mind up of which one to build.
1.combustion: 3x18 inch chamber, 1.5x60 inch barrel, metered propane, fan, and stungun.
2.pnuematic: 1.5x48 inch chamber, 1 inch modified sprinkler valve, 1.25x60 barrel.
These numbers just seem to be what people use who claim they achieved 300 yards.

[LynyrdSkynyrd]

well, combustion would make a nice bang, but probably would be more expensive than a simple pneumatic.

idk, i'm kinda partial to pneumatics. I've always liked them better.

[jon_89]

I am leading towards the pnuematic just because I know it will work, but I like the combustion because of its portability. So do you think 300 yards is possible?

[LynyrdSkynyrd]

o yea. if the chamber:barrel ratio is right.

If you really want to get max distance you might want to make your own piston to get max flow.

[starman]

300 yards is further than most people think....

Depends on your ammo...going to be tough getting a potato slug out that far with anything... Golf ball or other hard ammo very doable. Hitting a potato with enough force to get it out 300 yards tends to vaporize it.

Chamber up to 4" on your combustion and put 3 centered spark gaps in there and you'll get golfballs out way further than that.

Of course, I'm a combustion guy....

[LynyrdSkynyrd]

yea thats true.

could get into a huge debate on which is better, pneumatics or combustion.
if you're shooting a golf ball either one would be simple to get over 300 yards.

with a cannon that small. it really doesn't matter. Its once you get to a much larger scale the pneumatics starts overcoming combustions (unless of course you start using gunpowder.)

[pat123]

according to hgdt a 1 once projectile will be just short of making it. 854 feet or 284 yards.
this is based on the combustion that you explained.

[starman]

yea thats true.

could get into a huge debate on which is better, pneumatics or combustion.
if you're shooting a golf ball either one would be simple to get over 300 yards.

with a cannon that small. it really doesn't matter. Its once you get to a much larger scale the pneumatics starts overcoming combustions (unless of course you start using gunpowder.)

....Or hybridization and burst disks...

[Spuddin]

ive seen a couple 300 yard shots on here, one was pitbull and his softball combustion (300 yds or real close). and i think the other one was sthorne. im sure there are lots more.

[jimmy101]

Most claims of 300 yard ranges are bogus. It is possible with a golfball but probably not possible with most other common ammos (tennis balls, spuds etc.).

Can you even see a 1.5" shell at 300 yards? I have trouble seeing a 2" spud at 100 yards, at 300 yards the shell appears 9x smaller than at 100 yards.

[MrCrowley]

My SGV, which is a 1' 4" chamber with 1" sprinkler valve and a golfball barrel would probably only shoot about 250yards-270yards. You might need a bit more then that.

[jackssmirkingrevenge]

What pressure were you planning on using for a pneumatic? And a 2" sprinkler valve would be a better idea

More importantly, what were you planning as a projectile?

[LGM]

Well, you could freeze the potato to harden it and then turn it on a lathe to 1.5", then you get some oxygen…

If you put a piston valve on a pneumatic of those dimensions you should be throwing stuff pretty far out there. Spray your projectile with glow in the dark paint and fire a little after sunset (or shoot a flashlight) to find it.

[)DEMON(]

The only thing I would really want to launch 300 yards is my sister.

Don't forget that you could use a burst disk on a pneumatic as well.

[jackssmirkingrevenge]

The only thing I would really want to launch 300 yards is my sister.

hahahaha excellent!

Is she not of the age where it's convenient to know her friends?