Hi guys,

I've been watching over this forum for a while, only just signed up. Hoping to buy my first swaging setup for air rifle slugs. Can anyone identify the o give on the picture of the slug (bullet) below or know where I can find a calculator. I have the following dimensions:

Diameter: 5.52mm
Meplat Diameter: 3mm
Nose Length: 3.78mm

I apologise for the metric measurements used.

Here is an image of said slug, it could be that the slug does not in fact have a tangental or common o give, but worth an ask.

Click image for larger version. 

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I overlaid an image of a circle onto the above image and with a circle twist the diameter of the slug, the curve seemed to line up meaning that it might possibly be a 2-s, but plugging the numbers into a couple of formula's online came out with totally different answers, saying an o give radius of around 6mm. Should be around 11.04mm to be 2-s from my understanding.

Kez