a303 Posted October 13, 2015 Report Share Posted October 13, 2015 (edited) Cylinder ,cylinder Skeet, skeet 1/4, improved cylinder 1/2, modified 3/4, improved modified Full, full Skeet is often interperated differently according to the maker. Beretta optima HP skeet is actually more open than cylinder. Where most skeet chokes are slightly tighter than cylinder...... Cylinder is exactly that, no constriction at all. Edited October 13, 2015 by a303 Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted October 13, 2015 Report Share Posted October 13, 2015 In answer to some of the assumptions made earlier, have a look at these; http://www.briley.com/boresizesandconstrictions.aspx http://www.briley.com/europeantoamericanmarkings.aspx http://www.briley.com/leadtosteelshotconversion.aspx Quote Link to comment Share on other sites More sharing options...
Guest stevo Posted October 13, 2015 Report Share Posted October 13, 2015 ive got a headache , Quote Link to comment Share on other sites More sharing options...
Stonepark Posted October 13, 2015 Report Share Posted October 13, 2015 In answer to some of the assumptions made earlier, have a look at these; http://www.briley.com/boresizesandconstrictions.aspx http://www.briley.com/europeantoamericanmarkings.aspx http://www.briley.com/leadtosteelshotconversion.aspx This has english designations to compare...... and makes point that although americans have a standard dimension for choke, in reality, there is quite a variation in dimensions to get the required pattern depending on which cartridge is used. 12 Bore 20 Bore 28 Bore .410" Bore American English Browning Italian Spanish Perazzi Percentage Constriction Constriction Constriction Constriction Designation Designation Codes Codes Codes Codes Pattern .000" -.001" .000" - .001" .000" .000" cylinder true cylinder *** C**** ***** 0 40% .002" - .006" .002" - .004" .001" - .004" .001" - .002" skeet impr cylinder **$ S 1 45% .007" -.013" .005" - .011" .005" - .007" .003" - .006" impr cyl quarter **- **** **** 3 55% .014" -.023" .012" - .019" .008" - .014" .007 - .012" modified half ** *** *** 4 60% .024" -.031" .020" - .026" .015" - .020" .013" - .017 " impr mod three quarter *- ** ** 6 65% .032" -.040" .027" - .033" .021" - .027" .018" - .021" full full * * * 9 70% .040"+ .034"+ .028"+ .022"+ extra full 10 75% Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2015 Report Share Posted October 14, 2015 Told you! Quote Link to comment Share on other sites More sharing options...
ditchman Posted October 14, 2015 Report Share Posted October 14, 2015 i knew it would end up like this........................it always does ... just get out with the gun and see what the pattern is at 15 and 35 yrds..................then if you think it is too tight then open it up a bit....having fixed chokes bored out a bit is not an expensive job....then try it again...... simples ..eh Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2015 Report Share Posted October 14, 2015 i knew it would end up like this........................it always does ... just get out with the gun and see what the pattern is at 15 and 35 yrds..................then if you think it is too tight then open it up a bit....having fixed chokes bored out a bit is not an expensive job....then try it again...... simples ..eh Ain't that a fact but how do you open up true cylinders? Quote Link to comment Share on other sites More sharing options...
Underdog Posted October 14, 2015 Report Share Posted October 14, 2015 (edited) It can be done, check out recess choking or jug choking. I did it to a muzzloader one with a mandril I made. Sorry, mis understood, I thought you were talking about returning some choke. Edited October 14, 2015 by Underdog Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2015 Report Share Posted October 14, 2015 (edited) It can be done, check out recess choking or jug choking. I did it to a muzzloader one with a mandril I made. <script pagespeed_no_defer="">//=d.offsetWidth&&0>=d.offsetHeight)a=!1;else{c=d.getBoundingClientRect();var f=document.body;a=c.top+("pageYOffset"in window?window.pageYOffset:(document.documentElement||f.parentNode||f).scrollTop);c=c.left+("pageXOffset"in window?window.pageXOffset:(document.documentElement||f.parentNode||f).scrollLeft);f=a.toString()+","+c;b.b.hasOwnProperty(f)?a=!1:(b.b[f]=!0,a=a<=b.e.height&&c<=b.e.width)}a&&(b.a.push(e),b.d[e]=!0)};p.prototype.checkImageForCriticality=function(b){b.getBoundingClientRect&&q(this,b)};h("pagespeed.CriticalImages.checkImageForCriticality",function(b){n.checkImageForCriticality(b)});h("pagespeed.CriticalImages.checkCriticalImages",function(){r(n)});var r=function(b){b.b={};for(var d=["IMG","INPUT"],a=[],c=0;c=a.length+e.length&&(a+=e)}b.g&&(e="&rd="+encodeURIComponent(JSON.stringify(s())),131072>=a.length+e.length&&(a+=e),d=!0);t=a;if(d){c=b.f;b=b.h;var f;if(window.XMLHttpRequest)f=new XMLHttpRequest;else if(window.ActiveXObject)try{f=new ActiveXObject("Msxml2.XMLHTTP")}catch(k){try{f=new ActiveXObject("Microsoft.XMLHTTP")}catch(u){}}f&&(f.open("POST",c+(-1==c.indexOf("?")?"?":"&")+"url="+encodeURIComponent(b)),f.setRequestHeader("Content-Type","application/x-www-form-urlencoded"),f.send(a))}}},s=function(){var b={},d=document.getElementsByTagName("IMG");if(0==d.length)return{};var a=d[0];if(!("naturalWidth"in a&&"naturalHeight"in a))return{};for(var c=0;a=d[c];++c){var e=a.getAttribute("pagespeed_url_hash");e&&(!(e in b)&&0=b[e].k&&a.height>=b[e].j)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b},t="";h("pagespeed.CriticalImages.getBeaconData",function(){return t});h("pagespeed.CriticalImages.Run",function(b,d,a,c,e,f){var k=new p(b,d,a,e,f);n=k;c&&m(function(){window.setTimeout(function(){r(k)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','http://forums.pigeonwatch.co.uk/forums/index.php?s=b8bbaf1d66ec7e793125030f111a3095&app=forums&module=ajax§ion=topics&do=quote&t=322229&p=2921694&md5check=00fa5476a2950b3e06bbc8c33acfb5d9&isRte=1,l8PuqRhht8,true,false,Nq-D7qzNRfE');//]]></script> &&0 Sorry, mis understood, I thought you were talking about returning some choke. Was going to wait and see how the OP got on once he has the gun and patterned it as intended. If he has a problem and things are too loose for his needs (even with steel), as you say, this is one solution - might just get somewhere close to Imp - but don't know the current cost per barrel. Where's Gunman? Edited October 14, 2015 by wymberley Quote Link to comment Share on other sites More sharing options...
ditchman Posted October 14, 2015 Report Share Posted October 14, 2015 im not sure you will have to correct me on this one.....but i believe some "experiments " were done on ELIPTICAL boring of a true cylinder so the shot formed an elipticle beaten zone...for shooters who couldnt be bothered to "dial in" lead for crossing birds now that is laziness for you !! Quote Link to comment Share on other sites More sharing options...
FalconFN Posted October 14, 2015 Author Report Share Posted October 14, 2015 I'm picking it up from Bisley on the 27th I'll measure the bores and pattern test soon after. The seller said approximately cylinder and cylinder so it may well be slightly tighter, but it has 26" barrels so may have been shortened at some point. Quote Link to comment Share on other sites More sharing options...
motty Posted October 14, 2015 Report Share Posted October 14, 2015 That's WHAT I thought until I was proven wrong. cyl in the USA IS NOT true cyl, and IC isn't IC but 1/4 after which they have modified (our half) And then they have a skeet choke either side of their cyl too. So trying to equate anything under modified / 1/2 gets very difficult, especially when different makes start changing the names too. I ordered a beretta 1/4 choke off GMK and got delivered ICwhich they informed me is 1/4, and when I ordered IC I got told I already had it, called CYL. All very confusing to someone who was brought up on fixed chokes. Most guns in my youth were sold half full, and then bored to suit, some were sold quarter three quarter, or even three quarter full, but most were board prior to delivery according to customers wishes. Many were often bored again, when they were sold to someone else It matters little what the uk/usa equivalents are. I just don't believe your open choke and big pellet theory. Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2015 Report Share Posted October 14, 2015 I'm picking it up from Bisley on the 27th I'll measure the bores and pattern test soon after. The seller said approximately cylinder and cylinder so it may well be slightly tighter, but it has 26" barrels so may have been shortened at some point. Sounds like ****** star shot - again! Quote Link to comment Share on other sites More sharing options...
SuperGoose75 Posted October 14, 2015 Report Share Posted October 14, 2015 Sorry redditch' Im not jumping on the Band wagon nor im i an expert when it comes to Chokes ect but there is something not right with what your putting. I know there is not a lot of difference in a Metre and a good yard..by my calculation a metre is somthing around 3 feet. But killing birds clean at that distance through open chokes is just not right. I tend to agree with Wigeon man's comments on ehtics ect.. Tighter chokes are required for birds at that distance and even that is pushing things. I cant see how you can claim to get good patterns at that kind of distance with open chokes' I can only imagine how patchy they would be' not to mention the pellets running out of Steam. Quote Link to comment Share on other sites More sharing options...
FalconFN Posted October 14, 2015 Author Report Share Posted October 14, 2015 Sounds like ****** star shot - again! I'm not sure what that means, do you mean more open than 5 stars? Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2015 Report Share Posted October 14, 2015 I'm not sure what that means, do you mean more open than 5 stars? Sort of but I was avoiding the swear filter. When Starshot was introduced you needed a right load of No9 shot in something like TC or less. One option was to get an inexpensive gun and chop off the choke. Quote Link to comment Share on other sites More sharing options...
FalconFN Posted October 14, 2015 Author Report Share Posted October 14, 2015 Ah. That is a distinct possibility. Quote Link to comment Share on other sites More sharing options...
ditchman Posted October 14, 2015 Report Share Posted October 14, 2015 Sort of but I was avoiding the swear filter. When Starshot was introduced you needed a right load of No9 shot in something like TC or less. One option was to get an inexpensive gun and chop off the choke. other wise known as "a cash withdrawl tool"... Quote Link to comment Share on other sites More sharing options...
a303 Posted October 15, 2015 Report Share Posted October 15, 2015 Agree with above! Lol Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 15, 2015 Report Share Posted October 15, 2015 im not sure you will have to correct me on this one.....but i believe some "experiments " were done on ELIPTICAL boring of a true cylinder so the shot formed an elipticle beaten zone...for shooters who couldnt be bothered to "dial in" lead for crossing birds now that is laziness for you !! Yep, nothing new under the sun. Right hand barrel done for crossers and the left at 90 degrees for driven/going away and you've got it cracked. http://www.google.com/patents/US3226871 Quote Link to comment Share on other sites More sharing options...
Guest stevo Posted October 15, 2015 Report Share Posted October 15, 2015 To the OP . I use a MK 600 skeet gun with 26" barrels for decoying on a regular basis . And if i had to . I would rate myself as a fairly competent shot i spose . And depending on the shells i use . Its good for 25 -35 yards . As in producing reliable kills . The above is with lead or steel at those ranges there is no differnce . Atb stevo Quote Link to comment Share on other sites More sharing options...
FalconFN Posted October 15, 2015 Author Report Share Posted October 15, 2015 thanks stevo. I will find out soon enough if it was £40 wasted Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted October 15, 2015 Report Share Posted October 15, 2015 If you get stuck Mr Falcon then I have a FIAS OU sporterised Trap choked at SK & 1/4 that you are welcome to use to your hearts content-its a high rib Medalist by any other name and just sits in my cabinet gathering dust. Quote Link to comment Share on other sites More sharing options...
EdSolomons Posted October 15, 2015 Report Share Posted October 15, 2015 70 yards is a long way... I've done more than my fair share of long range shooting and would say I'm more comfortable than most past 50 odd yards, but I wouldn't dream of doing it without my regular tight chokes (3/4) and a minimum of 34g 5s. When I know I will be shooting real high stuff I go to 42g 4s as I know they are capable of what I want at the desired range. As many have I'm sure, I too have had lucky shots at extreme range, but everyone needs to know their limits and keep within them. A singular pellet in the neck at 70/80/90 yards proves nothing other than our luck was in that particular day. Keep in to 30 odd yards with cylinder and you will be fine, just be aware where it starts to become more luck than judgement. Quote Link to comment Share on other sites More sharing options...
subsonicnat Posted October 15, 2015 Report Share Posted October 15, 2015 70 yards is a long way... I've done more than my fair share of long range shooting and would say I'm more comfortable than most past 50 odd yards, but I wouldn't dream of doing it without my regular tight chokes (3/4) and a minimum of 34g 5s. When I know I will be shooting real high stuff I go to 42g 4s as I know they are capable of what I want at the desired range. As many have I'm sure, I too have had lucky shots at extreme range, but everyone needs to know their limits and keep within them. A singular pellet in the neck at 70/80/90 yards proves nothing other than our luck was in that particular day. Keep in to 30 odd yards with cylinder and you will be fine, just be aware where it starts to become more luck than judgement. Another good Answer. Well Put.. Quote Link to comment Share on other sites More sharing options...
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