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-   -   4.6x30 vs 5.7x28 (http://www.saubier.com/forum/showthread.php?t=11657)

foxhunter 10-24-2010 08:00 PM

4.6x30 vs 5.7x28
 
just wondering if the 4.6 case is any stronger than the 5.7 case?
extractor groove seems to be smaller which could mean a stronger head. other than that i can't see any real difference for 2mm in case length. head size seems to be about the same though actual chamber drawings don't seem to exist on the net.
http://img.photobucket.com/albums/v3...hings/46-1.jpg

DittoHead 10-24-2010 08:19 PM

The 5.7 case looks a little bigger in diameter, but it might be because it's positioned slightly closer to the camera. I guess you would have to form both into a wildcat with the same shoulder location and angle, and then determine the case capacity.

Other unseen differences might exist such as ease of resizing. I recall you had some problems with the Velociraptor that required an insert for the primer hole in the shell holder.

I have no idea about the strength of the case. :confused:

drewh 10-24-2010 08:27 PM

The nice thing about the 4.6 brass that I have handled is they don't have the coating on then that the 5.7 cases have.

Drew

ab_bentley 10-24-2010 08:56 PM

4.6x30:
Bullet diameter4.65 mm (0.183 in)
Neck diameter5.31 mm (0.209 in)
Shoulder diameter7.75 mm (0.305 in)
Base diameter8.02 mm (0.316 in)
Rim diameter8.00 mm (0.315 in)
Rim thickness1.10 mm (0.043 in)
Case length30.50 mm (1.201 in)
Overall length38.50 mm (1.516 in)
Rifling twist160 mm (1 in 6.3 in)
Primer typeBoxer Small Pistol
Maximum pressure400.00 MPa (58,015 psi)



5.7x28:
Neck diameter6.35 mm (0.25 in)
Shoulder diameter7.9 mm (0.311 in)
Base diameter7.9 mm (0.311 in)
Rim diameter7.80 mm (0.307 in)
Rim thickness1.14 mm (0.045 in)
Case length28.83 mm (1.135 in)
Overall length40.50 mm (1.594 in)
Case capacity0.90 cm³ (14 gr H2O)
Rifling twist228.6 mm (1:9 in)
Primer typeBoxer Small Rifle
Maximum pressure345.0 MPa (50,040 psi) [7

georgeld 10-25-2010 05:06 AM

What's the case body dia???
Thanks,

22_boomer 10-25-2010 09:33 AM

Quote:

Originally Posted by ab_bentley (Post 84055)
4.6x30:
Bullet diameter4.65 mm (0.183 in)
Neck diameter5.31 mm (0.209 in)
Shoulder diameter7.75 mm (0.305 in)
Base diameter8.02 mm (0.316 in)
Rim diameter8.00 mm (0.315 in)
Rim thickness1.10 mm (0.043 in)
Case length30.50 mm (1.201 in)
Overall length38.50 mm (1.516 in)
Rifling twist160 mm (1 in 6.3 in)
Primer typeBoxer Small Pistol
Maximum pressure400.00 MPa (58,015 psi)

5.7x28:
Neck diameter6.35 mm (0.25 in)
Shoulder diameter7.9 mm (0.311 in)
Base diameter7.9 mm (0.311 in)
Rim diameter7.80 mm (0.307 in)
Rim thickness1.14 mm (0.045 in)
Case length28.83 mm (1.135 in)
Overall length40.50 mm (1.594 in)
Case capacity0.90 cm³ (14 gr H2O)
Rifling twist228.6 mm (1:9 in)
Primer typeBoxer Small Rifle
Maximum pressure345.0 MPa (50,040 psi) [7

There must be a bit more meat in the 4.6x30 since the max pressure is at a nice level @ 58,015. I was just wondering how available the 4.6x30 brass was. Once fired 5.7x28 brass is easy to get.

Charlie

MarinePMI 10-25-2010 02:16 PM

It probably will become more common, as I know it was picked up by a military organization last year. I won't get into who specifically that was, but I know 600 PDW's were purchased... :cool:

Vibe 10-25-2010 02:19 PM

Quote:

Originally Posted by georgeld (Post 84073)
What's the case body dia???
Thanks,

4.6x30http://upload.wikimedia.org/wikipedi...4%2C6_x_30.jpghttp://upload.wikimedia.org/wikipedi...M1_Carbine.jpg

5.7x28http://upload.wikimedia.org/wikipedi...FN_round_1.png

ab_bentley 10-25-2010 02:21 PM

I saw those but didn't know how to decipher them. Adam

Vibe 10-25-2010 02:33 PM

Quote:

Originally Posted by ab_bentley (Post 84087)
I saw those but didn't know how to decipher them. Adam

All dimensions are in Millimeters - divide by 25.4 to get inches.
The 8.02mm body of the 4.6 would be .316"


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