Zetter Posted August 6, 2017 Report Share Posted August 6, 2017 Hi All I have inherited an AYA Yeoman off my uncle and the chokes are marked 17.4-18.4 and 17.9-18.4 how would this translate to standard chokes? I have tried looking on the web but got a bit confused so though that someone on here would have a better idea than me. Cheers Neil Quote Link to comment Share on other sites More sharing options...
wymberley Posted August 6, 2017 Report Share Posted August 6, 2017 (edited) 1/2 and Full, but apart from measuring the chokes (and the bores) there's no other way of knowing if that's still valid; ie, have they been opened up. 18 .4 = .724" 17.4 = .685" 17.9 = .705" 724 - 705 = 019 = 1/2 724 - 685 = 039 = Full Nominal figures are 020 and 040 - close enough. Edited August 6, 2017 by wymberley Quote Link to comment Share on other sites More sharing options...
JohnfromUK Posted August 6, 2017 Report Share Posted August 6, 2017 Yeomans started life as 'standard' half and full (at least they did when bought mine 40 years ago). I had it opened out (probably 1/4 and 1/2) - and later sold it. The only way to know is to have it measured (or do the patterning exercise) Quote Link to comment Share on other sites More sharing options...
Zetter Posted August 6, 2017 Author Report Share Posted August 6, 2017 Cheers Both I knew someone on here would know the anwser. Much appreciated Quote Link to comment Share on other sites More sharing options...
ditchman Posted August 6, 2017 Report Share Posted August 6, 2017 These choke questions do my head in... am i right in saying the degree choke can only be determined once the true bore of the barrell is established.....and the true bore is always stamped on the underside of the barrel...but must be verified incase it has been lapped or reamed out ........? Quote Link to comment Share on other sites More sharing options...
wymberley Posted August 6, 2017 Report Share Posted August 6, 2017 Yep. that'll give you the nominal choke. Quote Link to comment Share on other sites More sharing options...
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