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  #1  
Old 10-24-2010, 08:00 PM
foxhunter foxhunter is offline
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Default 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.
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  #2  
Old 10-24-2010, 08:19 PM
DittoHead DittoHead is offline
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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.
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  #3  
Old 10-24-2010, 08:27 PM
drewh drewh is offline
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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
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Old 10-24-2010, 08:56 PM
ab_bentley ab_bentley is offline
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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
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Last edited by ab_bentley; 10-24-2010 at 09:02 PM.
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  #5  
Old 10-25-2010, 05:06 AM
georgeld georgeld is offline
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What's the case body dia???
Thanks,
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  #6  
Old 10-25-2010, 09:33 AM
22_boomer 22_boomer is offline
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Quote:
Originally Posted by ab_bentley View Post
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

Last edited by 22_boomer; 10-25-2010 at 09:40 AM.
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  #7  
Old 10-25-2010, 02:16 PM
MarinePMI MarinePMI is offline
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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...
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  #8  
Old 10-25-2010, 02:19 PM
Vibe Vibe is offline
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Quote:
Originally Posted by georgeld View Post
What's the case body dia???
Thanks,
4.6x30

5.7x28
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Last edited by Vibe; 10-25-2010 at 02:26 PM.
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  #9  
Old 10-25-2010, 02:21 PM
ab_bentley ab_bentley is offline
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I saw those but didn't know how to decipher them. Adam
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  #10  
Old 10-25-2010, 02:33 PM
Vibe Vibe is offline
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Quote:
Originally Posted by ab_bentley View Post
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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