KV Railguns - Another idea

Thought of another idea for potential railguns:

Each railgun rolls 2 dice per class, hitting as per PT, but subtract 1
die for each full 6" of range.
All dice over 24" hit on a 6 only.
EG: a RG-1 rolls 2d at 6" & 1d at 12".	A RG-3 rolls 6d at 6" & 1d at
36".

For each die that hits, roll again; 1-3 = 1pt, 4-6 = 2pts.
(This would allow the addition of KV armour: same effect as old rules)

Damage Averages at Range:
		6"	12"	18"	24"	30"	36"	42"    
48"
RG-1(2d)	2.50	1.00	0	0	0	0	0      
0
RG-2(4d)	5.00	3.00	1.50	0.50	0	0	0      
0
RG-3(6d)	7.50	5.00	3.00	1.50	0.50	0.25	0      
0
RG-4(8d)	10.00	7.00	4.50	2.50	1.00	0.75	0.50   
0.25

'Neath Southern Skies
http://users.mcmedia.com.au/~denian/
*****
T'was brillig, & the slithy toves,
Did gyre & gimle in the wabe.
All mimsy were the borogroves,
And mome raths outgrabe.
		       - Lewis Carroll "Through the Looking Glass".