Hi Simon,
I have a `D` shaped side wheel which gives me an effective radius of 95mm at 50/55 yds, and the circumfrential measurement between 50 and 55 yds is 8mm.
cheers PJ
Hi Simon,
I have a `D` shaped side wheel which gives me an effective radius of 95mm at 50/55 yds, and the circumfrential measurement between 50 and 55 yds is 8mm.
cheers PJ
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