UHMW test rounds

[Technician1002]

Thanks for everyone's interest. I posted the 1.5", 1.7" and 2" varieties on the web site. http://ultimatespudgun.com/index.php?cPath=50 .5, .75", 1", 2.5", 3" material is on the way.

Mike
Sureshot / http://www.ultimatespudgun.com

Sweet. Would it take much to make them with "Foating" rings? The rings would seal on fireing, but would have very low friction and would work in iron, copper, PVC, and cellular core ABS.

I noticed that pistons for PVC, ABS, or iron are not interchangable when I started making piston valves. You may want to spec them to the barrel material instead of just Sched 40 material. Someone with an ABS cannon may be dissapointed if these almost fit, but not quite.

I may order some for the 3 inch QDV I plan to build to use as a valve when you get them in stock.

[USGF]

Sweet. Would it take much to make them with "Foating" rings? The rings would seal on fireing, but would have very low friction and would work in iron, copper, PVC, and cellular core ABS.

I noticed that pistons for PVC, ABS, or iron are not interchangable when I started making piston valves. You may want to spec them to the barrel material instead of just Sched 40 material. Someone with an ABS cannon may be dissapointed if these almost fit, but not quite.

I may order some for the 3 inch QDV I plan to build to use as a valve when you get them in stock.

Tech, we made a few that had deeper O-ring grooves. Problem is, the o-ring would not give enough friction to hold the round in the bore. Darn things slide right out. We will research an ideal size. We could produce various sizes but it would increase cost to stock too many sizes.

[Technician1002]

Sweet. Would it take much to make them with "Foating" rings? The rings would seal on fireing, but would have very low friction and would work in iron, copper, PVC, and cellular core ABS.

I noticed that pistons for PVC, ABS, or iron are not interchangable when I started making piston valves. You may want to spec them to the barrel material instead of just Sched 40 material. Someone with an ABS cannon may be dissapointed if these almost fit, but not quite.

I may order some for the 3 inch QDV I plan to build to use as a valve when you get them in stock.

Tech, we made a few that had deeper O-ring grooves. Problem is, the o-ring would not give enough friction to hold the round in the bore. Darn things slide right out. We will research an ideal size. We could produce various sizes but it would increase cost to stock too many sizes.

Use a slightly larger o ring so the ring expansion is just enough to hold it in place. It's OK for the round to be loose in the rings.

My video on using o rings show this well. The piston is held and requires a shake to move it. The loose rings permit use in a range of barrel tolerances.

If you haven't seen it, it's here;

[USGF]

Tech, I did see your video in the past. My concern is the accuracy VS. velocity issue. In the BL series of guns, power or more correctly, lack of power has not been an issue. We will see what Mike comes up with.

Good point, on the ability of the oversized O-ring to hold and seal in the bore. Still the issue of projectile concentricity in the bore remains. I was thinking along the line of a plastic cup style seal that snaps into a groove just like an o-ring. Like a lighter cheaper version of a brake cylinder seal.

Since these are an obscure part (if made at all), we may be forced to machine some molds for these. Mold them from a milk jug type plastic. These would conform to a variety of bore sizes yet center the round perfectly. In theory anyway

[CasinoVanart]

I say loose the o rings and use a flared tail end. Less friction means more velocity

[jagerbond]

I say loose the o rings and use a flared tail end. Less friction means more velocity

Cutting it out of 2.5" will elevate the cost substantially. Like USGF said the projectile stays concentric in the barrel. There is very little friction like stated before just enough to hold the round in the barrel plus we're using Superlube™.

Mike
Sureshot / http://www.ultimatespudgun.com

[jackssmirkingrevenge]

Great stuff, have you considered a harder (steel?) core when it comes to punching holes in harder materials? In the vein of Armor Piercing, Composite Rigid rounds?

[jagerbond]

Great stuff, have you considered a harder (steel?) core when it comes to punching holes in harder materials? In the vein of Armor Piercing, Composite Rigid rounds?

We did use steel inserts I just never photographed the setup, but I will update soon. The photos in the beginning of the thread we're taken after steel insert rounds. We will load up the 625 with carbide and see if we can penetrate that pesky 3/16 C channel.

Mike
Sureshot Inc. / http://www.ultimatespudgun.com

[jackssmirkingrevenge]

I might have missed that, over 500 new posts after a four day absence and I'm trying to keep up

[jeepkahn]

HMMM.. maybe an insert round combo that would be more of a "spitzer" shaped round with a tungsten insert...

[jackssmirkingrevenge]

HMMM.. maybe an insert round combo that would be more of a "spitzer" shaped round with a tungsten insert...

I would say that the best idea is to have a small calibre insert capable of aerodynamic stability through fins or a hollow tail and fly separately - ie in a discarding sabot - because an integral insert might be effective at close range but due to a poorer ballistic coeffient velocity and therefore penetrating power will taber off rapidly as it goes further from the muzzle.

[jeepkahn]

HMMM.. maybe an insert round combo that would be more of a "spitzer" shaped round with a tungsten insert...

I would say that the best idea is to have a small calibre insert capable of aerodynamic stability through fins or a hollow tail and fly separately - ie in a discarding sabot - because an integral insert might be effective at close range but due to a poorer ballistic coeffient velocity and therefore penetrating power will taber off rapidly as it goes further from the muzzle.

For a discarding sabot, you could use a muchless dense/less costly material as well, maintain lighter weight....

[jook13]

I saw these for sale on the web site. I will be sure to order some this friday when I get my paycheck. I have another TV what needs destoryin'.

[starman]

I say loose the o rings and use a flared tail end. Less friction means more velocity

I'm with Casino. Shave the sides down to where it looks like giant pellet...only the front ball and edge of the rear skirt "riding" the barrel.

Have you thought about dimpling the windward face like a golf ball? You could also front weight it with lead inserts...drill in from the rear to leave the tough surface intact....I know, just more manufacturing detail...just thinking off the top of my head here.

[jagerbond]

It is the beauty of CNC lathe. I will take recommendations and R&D new designs for optimization. If you guys write HP in the order comments and give dimensions we will size a hollow point for carrying.. "stuff" Our test round HPs would occasionally lose there pay load but retained shape and usability even with the shots to steel.

These HP rounds do sing with a steel insert.

Check out the 1.7s right from the lathe.

Mike
Sureshot Inc. / http://www.ultimatespudgun.com