Replace your default Sniper Rifle data line with this one :

#$ SNIPERRIFLE		INSTANT_HIT	140.0 100.0	358	-1		6	sniper		30	 125	0.9  -0.05  0.2 	0  0	0.75 1.0 	 6 17  7	6  17  7  99	A014
$ SNIPERRIFLE		INSTANT_HIT	155.0 100.0	358	-1		6	sniper		30	 140	0.9  -0.05  0.2 	1  300	1.0  1.0 	 6  9  6	6  9   6  99	A014
#$ SNIPERRIFLE		INSTANT_HIT	160.0 600.0	358	-1		6	sniper		30	 140	0.9  -0.05  0.2 	2  999	1.25 1.0 	 6  9  6	6  9   6  99	A014
