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Old 12th March 2011, 07:42 PM
Jon Jon is offline
Senior Member
Join Date: Nov 2008
Location: Nr Wolvo
Posts: 769

Have known loads of cheaper scopes do exactly that. One producer knows it as ret wandering.

The only decent way of checking is to clamp scope rigid thus eliminating user error. Bean bag, workmate vice or bench not good enough, something substantial.
The other way is slap a collimator on, this will show the ret movement whilst adjusting the focus, some are unreal looking several inches over 20 yards spread!
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