wymberley Posted June 27, 2018 Report Share Posted June 27, 2018 As is generally understood, no matter what make, these are no help if the barrel nominal bore diameter is unknown. I'm having a fiddle with some guns where the barrel dimension is as it should be so all should be well within the limits of the guage's capability for accuracy. Or not. If you're talking English, then the one I've just had delivered from Ramsbottom via Amazon coming open from Full is c0.010" tighter than it should be until you get to Imp Cyl when it drops to c0.005" for this and TC.. No problem if you're aware of it, but you'd have thought that in the 21st century somebody could have machined a bit of brass a tad better. Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted June 27, 2018 Report Share Posted June 27, 2018 Why would they make anything better, you parted with your money and so will many others. Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 27, 2018 Author Report Share Posted June 27, 2018 25 minutes ago, TIGHTCHOKE said: Why would they make anything better, you parted with your money and so will many others. True enough. A moan on PW is going to have little or no effect, but 'ere long someone is going to be chasing me for a review. They'll get one and i'll feel much better for it. Quote Link to comment Share on other sites More sharing options...
Gunman Posted June 27, 2018 Report Share Posted June 27, 2018 Dont forget that some countries choke standards differ as do some manufactures ,from the accepted range we know . You can only relay measure by using the bore size 2/4" behind the choke , This may not be the same as the nominal bore size fore proof .Thats 9 inches from breech UK but I believe its 6" in some continental proof houses. "Carrot" type gauges are next to useless IMHO for general use . Quote Link to comment Share on other sites More sharing options...
figgy Posted June 27, 2018 Report Share Posted June 27, 2018 I use a vernier gauge to measure at muzzles and check against proof size of bore. Only a rough guide but gives you an indication of the chokes. Quote Link to comment Share on other sites More sharing options...
McSpredder Posted June 27, 2018 Report Share Posted June 27, 2018 You can get a pretty good idea of choke constriction with the aid of a simple spring-leg caliper costing around £5. Insert the spring-leg caliper down the muzzle and turn the adjusting nut until the legs are only just touching the bore, then squeeze the legs together and withdraw (taking care not to move the nut). Now let the legs spring out as far as the nut allows, and the bore size behind the choke can be found using any external measuring device (eg a digital caliper as sold by Lidl/Aldi for about £8). Definitely not as good as the proper three-point bore measuring instrument used by professionals, but OK if you just want to find the choke constriction to within one or two thou, and much better than relying on a “carrot”. Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 28, 2018 Author Report Share Posted June 28, 2018 7 hours ago, McSpredder said: You can get a pretty good idea of choke constriction with the aid of a simple spring-leg caliper costing around £5. Insert the spring-leg caliper down the muzzle and turn the adjusting nut until the legs are only just touching the bore, then squeeze the legs together and withdraw (taking care not to move the nut). Now let the legs spring out as far as the nut allows, and the bore size behind the choke can be found using any external measuring device (eg a digital caliper as sold by Lidl/Aldi for about £8). Definitely not as good as the proper three-point bore measuring instrument used by professionals, but OK if you just want to find the choke constriction to within one or two thou, and much better than relying on a “carrot”. Still not as good as suggested above, but stick a dial on one end makes this even easier. Problem I find when doing a quick rough estimate is with Teague type fully tapered chokes is that the gauge tends to flip out at the very end. About the only time said carrot is any good provided you have found or know the bore size. Still say you'd have thought that with a product bearing an English name, sold in England and with UK choke size denominations it would have been possible to make it to size. Quote Link to comment Share on other sites More sharing options...
impala59 Posted June 28, 2018 Report Share Posted June 28, 2018 IMHO the pattern plate is the only true indication, as stated above bores vary, choke carrots vary, in fact just about everything varies, so with a given gun, distance and ammunition of choice the paper will tell the truth Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted June 29, 2018 Report Share Posted June 29, 2018 8 hours ago, impala59 said: IMHO the pattern plate is the only true indication, as stated above bores vary, choke carrots vary, in fact just about everything varies, so with a given gun, distance and ammunition of choice the paper will tell the truth Amen to that! It is the ONLY way. Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 29, 2018 Author Report Share Posted June 29, 2018 8 hours ago, impala59 said: IMHO the pattern plate is the only true indication, as stated above bores vary, choke carrots vary, in fact just about everything varies, so with a given gun, distance and ammunition of choice the paper will tell the truth Absolutely, it's a shame it isn't done more often. Quote Link to comment Share on other sites More sharing options...
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