这里挑选的为榜单效率最高的前八位，它们都有共同的特点
1 民间所制，非国立研究所项目  
2 磁阻式线圈炮
3 效率和能量都比较可怜
最后，可以告诉大家，这个记录里长期由外国佬把持榜单第一的现象，很快将成为历史。
我们制作出的磁阻炮将在很长的一段时间内不会被别人超越。
Robert Wilsford
Model: PAR-1, 2008 ("Wilsford-71-08")
450V @ 48J Source 2.86J kinetic 29m/s. 1 coil stage, 12V 30A Relay switch and 1 s charge.
Projectile: 6.8 grams, 6.8 mm dia, 25 mm length. Rifle Mass - 2.7 kg, powered by 8 C battery.
  Kx=17.67   n=6.01%
  Future Experimental Systems  USA
  
  
  
Jonathan Filippi
Model: EMR0260S03HBP1TA, 2006 ("Filippi-63-06")
300V @ 260J (114J) Source 6.6J kinetic 40.8m/s. 3-stage IGBT's halfbridge, optically sensors.
Projectile: 8 grams, 5.5 mm dia. DC 12V 2.2AH SLA. 40 seconds charge time (20 s next).
Kx=14.60   n=5.8%
  Cool Science  Italy
  
  
  
Donnie James
Model: ACG 85P, 2006 ("James-82-06")
330V @ 87J Source 4.5J kinetic 29m/s. 2 coil stages and 1 seconds charge time.
Projectile: 10.5 grams, 8 mm dia. Semi-automatic 10 round. DC 32v AAA NiMH.

Nicora Dagrass
Model: EML-2000CPM2 Kudryavka, 2008 ("Dagrass-72-08")
Kx=9.67   n=5.17%
  Another Coilgun Site  USA
  
  
  
Llevellyn
Model: MSC-18, 2009 ("Llevellyn-818-09")
550J Source 28J kinetic 70m/s. 18 coil stages and 13 seconds charge time.
Projectile: 11.4 grams, 8 mm dia. DC 12V 1.3AH SLA. Weight 5.3kg
Kx=8.91   n=5.09%
  XXXXXXXXXXXXX  Russia
  
  
  
  
James Paul
Model: CS-P01A, 2003 ("[s:9]aul-93-03")
92V @ 131J Source 5.74J kinetic 30m/s. 3 coil stages, 10 round clip, and 6 s charge time.
Projectile: 12.5 grams, 9.4 mm dia. This optically triggered 3 stage semi-automatic pistol.
Kx=7.01   n=4.38%
  Coilgun Systems  United Kingdom
  
  
  
Dima Afanasov
Model: 12oZ Mouse, 2009 ("Afanasov-84-09")
800V @ 400J Source 16.1J kinetic 48m/s. 4 coil stages, 8 s charge time.
Projectile: 14 grams, 8 mm dia. 40TPS12 SCR's switch. DC 12V NiCd. Mass 3.7 kg

Kx=5.76   n=4.03%
No link  Russia
  
  
  


Model: ACG 130, 2005 ("James-82-05")
330V @ 130J Source 4.6J kinetic 32m/s. 2 coil stages, 10 round clip, and 8 s charge time.
Projectile: 9 grams, 8 mm dia. Fully Microcontroller Design.
  Kx=7.88   n=3.54%
  Another Coilgun Site  USA
  
  
  


  
Dmitry Senyakin
Model: CG2007_1, 2007 ("Senyakin-620-07")
104V @ 1080J (295J) Source 10.5J kinetic 66m/s. 20-stage, MOSFET's, optically sensors.
Projectile: 4.8 grams, 5.7 mm dia, 30 mm length. DC 12V 1.3AH SLA + 6V 1.3AH SLA.
Kx=14.77   n=3.5%
No link  Ukraine

XXXXXXXXXXXXXX 这个是英国人的线圈炮网站（类似我国科创论坛的电武版块）
其中有个18级，效率5%的~~额~~磁阻炮，在对他的评论中，我找到了版主的这么一段话：
    “28J means you have built one of the most powerful coilguns 4HV has seen! Great job!Whats your charging system?”
第二位发言：
    “Very nice speed for the joules! Awhile ago I was messing with single coil, 28J, and it did 10ft..but it couldnt even hole a can. Yours by far is stronger than anything i ever made because i never gone through coffee cans”
这个单级28J倒是和我们的数量级一样，不过不知道这个作品有无多级加速。
注：本贴转自校内“常胜”某某。