After the original attempt to zero the new scope fitted to my newly acquired 2005 manufactured Webley Venom Viper which produced a group at ten yards of over ten inches in size, it is the largest group that any rifle I have owned has produce when being zeroed.
After contacting Steve Pope of V-Mach Custom Rifles Ltd. Who designed and made the air rifle for Webley, He was extremely helpful and free with technical information to help me rectify the problem.
Following Steve’s advice, I eventually traced the cause of the problem that made the rifle perform so inaccurately, was an aftermarket moderator which was misaligned with the barrel shroud causing the pellets to clip.
Steve recommended that a shorter moderator should be used or the aftermarket moderator fitted should have the size of the holes in the baffles enlarged.
I took the original aftermarket moderator apart and bored the baffles out from their original diameter hole of 6mm to the much larger 10mm size the increase in the noise level is of no consequence as far as I am concerned.
After zeroing the rifle the group size produced by the Webley Venom Viper is .700” or 17.7mm at 25 yards.
In the photograph a 5 pence coin has been place on the target for comparison.
Photograph of target here:
https://www.flickr.com/photos/159592...7669156931367/