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.740 Bore Projectile

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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.740 Bore Projectile

Unread postAuthor: dewey-1 » Wed Mar 24, 2010 2:16 pm

Here is probably the most ideal, consistent and accurate projectile you could use for a smoothbore home built launcher!

You can not home build one for the price of $.65 each.

This one is for .740 inch bore. (18.796mm) to be exact.
19.00mm nominal size or .748 inch bore.

Here is a link for USA;

http://www.midwayusa.com/viewProduct/?p ... ber=557135
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 24, 2010 2:49 pm

Good find, and not that expensive either, 100 for $65 isn't such a big deal (unless you've made an autocannon :roll:) for the dedicated enthusiast.

They will probably leave the barrel of your average pneumatic at a fairly low subsonic velocity, so trajectory could be expected to be a bit howitzer-like at longer ranges, however even at say 500 fps keeping all your shots on a saucer at 50 yards should be no problem with a consistent launcher and reliable sight setup.
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Unread postAuthor: deathbyDWV » Wed Mar 24, 2010 2:57 pm

Ooooo!!! Those are cool. And I have a new hybrid. Looks like I need a 3/4 inch barrel.
They really aren't that expensive too...
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Unread postAuthor: dewey-1 » Wed Mar 24, 2010 2:59 pm

JSR;
You need to try these with your HPA source!

I know, that is to big of bore for you! :D

If I could still build stuff, I would definitely try some.
Maybe some one else will give them a try and report their results.

Heard anything about these on Box of Truth?
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 24, 2010 3:21 pm

dewey-1 wrote:You need to try these with your HPA source!

I know, that is to big of bore for you! :D


My 0.75" pneumatic was already about the limit I could shoot at home at just 100 psi, I wish I could crank it up with HPA but it would be a project I could never use :-/

Heard anything about these on Box of Truth?


Not this particular brand but there's an interesting "rifled vs unrifled barrels for slugs" article ;)
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Unread postAuthor: dewey-1 » Wed Mar 24, 2010 3:38 pm

The optimal barrel for these would be 3/4 inch Copper Type K which is the thickwall version.

The ID is .745 inch nominal.
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Unread postAuthor: Gippeto » Wed Mar 24, 2010 10:34 pm

Maybe with a shotgun wad it'll fit the co-ax...Hmmm.

Something to think about, but they are awfully light at only 1 oz.

Thanks for the link Dewey, good find! :D
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