gatnerd

Military Guns and Ammunition

Hosted by gatnerd

This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.

  • 3271
    MEMBERS
  • 185570
    MESSAGES
  • 0
    POSTS TODAY

Discussions

NGSW Phase 2 Consolidation and info   Small Arms <20mm

Started 30/8/19 by gatnerd; 279487 views.
smg762

From: smg762

26-Sep

If you mean a squeezebore adaptor, its likely to deform the bullet enough to affect accuracy.

The concept works as planned - use the .23 / .243 caliber to get a high ME....and then add a 43grain FABRL to allow your 5000fps

Velocity related wear is easier to solve but it really needs a cool propellant otherwise this round will eat away at the throat

smg762

From: smg762

26-Sep

What would be the approximate BC of this 43grn FABRL...assuming a .243 diameter?

Note that the shape is much more refined than the original fabrl - the ogive is actually slightly inverted inwards

  • Edited 26 September 2021 12:01  by  smg762
roguetechie

From: roguetechie

26-Sep

You wouldn't want to do a "swappable barrel throat" think about all the supporting gun structure you'd need to build up around that in order to ensure precise alignment etc. That's a recipe for an unreasonably heavy gun.

Also as useful as 4900 fps would be, it's just kinda not worth taking it to that extreme In a full caliber bore rider projectile configuration.

If you're going to go to all the trouble to launch something that fast you might as well take it all the way and send something with a 10-25:1 length to diameter ratio and just figure out acceptable parasitic mass ratio sabots.

smg762

From: smg762

26-Sep

Isnt the 6.8 fairly overbore?  Im sure the LMG would have less barrel life than a 762 equivalent

smg762

From: smg762

27-Sep

Going back to the FCS on 6.8, i was surprised that all the guns have a recoiling barrel... if one wanted 700m precision shots, is this going to be a handicap...

surely its better to have a sensor on the barrel and a smart optic that reads the sensor

roguetechie

From: roguetechie

28-Sep

Actually, barrel life is well in hand.

As far as the recoiling barrel thing, the answer is no.

poliorcetes

From: poliorcetes

30-Sep

HI all,

Does somebody know what is the source of this photo of a mockup that Drummond posted 4 years ago?

Image

smg762

From: smg762

30-Sep

he also posted this...i dunno what the round on the far right is

EwingGreg

From: EwingGreg

1-Oct

I remember someone here claimed more info,  basically the case was loaded with Rocket fuel and ran at 80-100k psi.     Some of these proposals we are seeing...   I wanted it scaled to 6mm or .257, but I am odd. 

stancrist

From: stancrist

1-Oct

I would really like to know how thoroughly that round was tested.  Was it fired only in test barrels, or were any machine guns and assault rifles converted? 

I'm very skeptical that such a long, thin, un-tapered case would chamber and extract reliably in automatic weapons, especially after propellant residue has accumulated in the chamber.

TOP