Timberwolf00 Posted January 11, 2017 Report Share Posted January 11, 2017 (edited) The above is stated with 693 on it any idea what the choke size is its a 12g. Edited January 11, 2017 by Timberwolf00 Quote Link to comment Share on other sites More sharing options...
motty Posted January 11, 2017 Report Share Posted January 11, 2017 Full? Quote Link to comment Share on other sites More sharing options...
Timberwolf00 Posted January 11, 2017 Author Report Share Posted January 11, 2017 Full?it measures a tight half with my gauge think it must be faulty Quote Link to comment Share on other sites More sharing options...
WelshAndy Posted January 11, 2017 Report Share Posted January 11, 2017 Think Stevo used to shoot with one of these, maybe worth a pm. Quote Link to comment Share on other sites More sharing options...
Highlandladdie Posted January 11, 2017 Report Share Posted January 11, 2017 What gun is it in? If you know the barrel dimensions you can work it out? Quote Link to comment Share on other sites More sharing options...
Timberwolf00 Posted January 11, 2017 Author Report Share Posted January 11, 2017 Berreta silver mallard m8 not sure of barrel dimensions. Quote Link to comment Share on other sites More sharing options...
Highlandladdie Posted January 11, 2017 Report Share Posted January 11, 2017 (edited) I'd hazard that it's not quite a full, but tighter than a light full. Edit - is basically a full. 0.002 bigger than a full and 0.003 tighter than a light full. I think Edited January 11, 2017 by Highlandladdie Quote Link to comment Share on other sites More sharing options...
Stonepark Posted January 11, 2017 Report Share Posted January 11, 2017 0.693 should be Improved Modified, but you will ave to pattern at 40yds with your preferred cartridge to be sure. Quote Link to comment Share on other sites More sharing options...
Timberwolf00 Posted January 11, 2017 Author Report Share Posted January 11, 2017 0.693 should be Improved Modified, but you will ave to pattern at 40yds with your preferred cartridge to be sure.basically it's more or less 3/4? Quote Link to comment Share on other sites More sharing options...
Highlandladdie Posted January 11, 2017 Report Share Posted January 11, 2017 0.693 should be Improved Modified Where are you getting your numbers from chieftain? Nominally a 12b in 0.729 internal diameter, so 0.693 gives a constriction of 0.036, or full (standard at 0.035) near enough. I had read that the beretta was slightly tight at 0.725 internal diameter, hence my last post. I might be wrong though. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted January 12, 2017 Report Share Posted January 12, 2017 its about right, .729 for the bore, but some brand of barrels are tighter / looser. optima bore and invector to name a few choke styles, to be related to the bore / bore size. my merkel is over bore and silly silly tight, extra full, really. so working in restriction by thou 0.000" is kind of correct but only if the bore and choke is measured. but restriction and patterns are a different ballgame. Quote Link to comment Share on other sites More sharing options...
Stonepark Posted January 12, 2017 Report Share Posted January 12, 2017 The Smoke choke is an American Full (0.035 constriction), rather than a English Full (0.040 constriction). An English 3/4 is 0.030.The barrel next to proof marks should be stamped with dimensions, normally in metric and between 18.3 and 18.7,(0.720 and 0.736) however this is the closest to 0.1mm and not as accurate as it could be but is a start. Whilst you can get an empirical idea of the choke from measuring internal diameters of both barrel and choke and looking at the difference, the only way to know for sure is to pattern with preferred cartridge at 40 yards and count pellet No in 30 inch circle and compare to an unfired cartridge pellet count. Quote Link to comment Share on other sites More sharing options...
Highlandladdie Posted January 12, 2017 Report Share Posted January 12, 2017 (edited) The Smoke choke is an American Full (0.035 constriction), rather than a English Full (0.040 constriction). An English 3/4 is 0.030. Thats where I was going wrong Edit - going off topic a bit, so I own a winchester. Is my 3/4 choke a 1/2 really? and 1/2 a 1/4? So, what you are saying is disregard the numbers completely. Patterning is the only way. Edited January 12, 2017 by Highlandladdie Quote Link to comment Share on other sites More sharing options...
Timberwolf00 Posted January 12, 2017 Author Report Share Posted January 12, 2017 0.693 should be Improved Modified, but you will ave to pattern at 40yds with your preferred cartridge to be sure.3/4 choke it is bud. Quote Link to comment Share on other sites More sharing options...
Stonepark Posted January 12, 2017 Report Share Posted January 12, 2017 Thats where I was going wrong Edit - going off topic a bit, so I own a winchester. Is my 3/4 choke a 1/2 really? and 1/2 a 1/4? So, what you are saying is disregard the numbers completely. Patterning is the only way. The numbers give you a starting point, however I pattern my 12b with every new cartridge (mainly fibre) that I buy and have ranged from 41% to 57% for a Briley Light Modified (0.017 constriction) for game shooting with most sitting between 52% and 55%. Please note that 1 dedicated (expensive) clay cartridge with plastic wad comes in at 67% through the same choke. Unless you pattern your gun/choke/cartridge combination you don't know what you are actually getting as the above choke ranged from cyl to 3/4 choke depending on which cartridge was used. Quote Link to comment Share on other sites More sharing options...
figgy Posted January 12, 2017 Report Share Posted January 12, 2017 (edited) It's 7/8th choke or light Full if you prefer the term. In old money every ten thou tighter than the bore measures is on quarter of choke restriction. So 10 thou is 1/4 20 thou 1/2 30 thou 3/4 40 thou 1 full The in between ones are 5 thou 1/8th skeet 15 thou 3/8th 25 thou 5/8th 35thou 7/8th light full Edited January 12, 2017 by figgy Quote Link to comment Share on other sites More sharing options...
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