wymberley Posted August 11, 2020 Report Share Posted August 11, 2020 Having a chat elsewhere with a mate and I can't find the info' that I'm after. Am I right in thinking that strictly speaking the Subject calibre should be illegal for use on deer in the UK? This is because the 243 is the exception to the rule and because of this is actually .238 and therefore under the .240 required because in this case the calibre is taken differently from the norm. I'm sure that this was mentioned on PW back along but I can't find it. Quote Link to comment Share on other sites More sharing options...
matone Posted August 11, 2020 Report Share Posted August 11, 2020 A stone best left unturned if ever there was one. Quote Link to comment Share on other sites More sharing options...
scobydog Posted August 11, 2020 Report Share Posted August 11, 2020 The barrel bore is usually .237 but the bullet is .243, when you chamber a round it forces into the grooves/rifling which is .243. Hope this helps. Scobydog Quote Link to comment Share on other sites More sharing options...
wymberley Posted August 11, 2020 Author Report Share Posted August 11, 2020 I don't think we need to concern ourselves, it's just one of those quirky facts. Thanks, Scobydog. Yep, the 243 is given the rifling cut depth diameter as its calibre whereas every other calibre refers to the bore. Quote Link to comment Share on other sites More sharing options...
scobydog Posted August 11, 2020 Report Share Posted August 11, 2020 Pic for those interested. Quote Link to comment Share on other sites More sharing options...
London Best Posted August 11, 2020 Report Share Posted August 11, 2020 38 minutes ago, wymberley said: I don't think we need to concern ourselves, it's just one of those quirky facts. Thanks, Scobydog. Yep, the 243 is given the rifling cut depth diameter as its calibre whereas every other calibre refers to the bore. Every other calibre refers to the bore? Except those that don’t! How about .308? Or .458? Just for a start! There is no hard and fast rule. Quote Link to comment Share on other sites More sharing options...
wymberley Posted August 11, 2020 Author Report Share Posted August 11, 2020 17 minutes ago, London Best said: Every other calibre refers to the bore? Except those that don’t! How about .308? Or .458? Just for a start! There is no hard and fast rule. Those that don't are colloquially known as the exceptions to the rule. Quote Link to comment Share on other sites More sharing options...
London Best Posted August 11, 2020 Report Share Posted August 11, 2020 As a rule of thumb, that is not actually a rule at all, most of the older calibres quoted the bore size whereas the more ‘modern’ calibres ( post WW11?) usually quote the groove diameter. eg: .303 = .311 groove. .308 = .300 bore. Quote Link to comment Share on other sites More sharing options...
wymberley Posted August 11, 2020 Author Report Share Posted August 11, 2020 I'm positively pre-war. Quote Link to comment Share on other sites More sharing options...
Mr.C Posted August 11, 2020 Report Share Posted August 11, 2020 Me too, Vietnam War. Quote Link to comment Share on other sites More sharing options...
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