So I usually run a patternmaster on my 20g gold browning but had shot skeet the week before so had put it in a good "place" could not find it so put the invector plus "mod" choke in. My daughter was going duck hunting with me so gave her the 20g and I took the 12.She normally is a pretty fair shot and I gave her first go on everything that came in and we had several feet down over decoys and she would scratch one or cripple one. We had a good shoot so came home and put everything away. So cleaning the shop out found my 20g patternmaser and put it in and took the mod choke out. I have a choke gauge sitting on my bench so just for the hell of it checked the mod invector choke.It was cylinder??Checked the full choke tube was full, skeet tube skeet, checked inside dia. on the "mod" tube nope straight cylinder. No wonder she had issues with some of her shots. Quality control out the window or just misnamed anybody else had issues? cheers
Invector plus chokes
- Thread starter reddog
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Falconflyer
CGN Ultra frequent flyer
Probably a QC issue if the other choke tubes checked ok. I would suspect that a choke tube got taken from the line and got put back in the wrong group on it's way to the etching machine.... stuff happens.
I suspect your choke gauge. Invector plus barrels like yours are much larger in diameter than the standard .630" . Your choke guage was most likely made to measure chokes in this standard size barrel. A Browning Invector Plus barrel of any guage is larger than the SAAMI standard for that guage so the chokes must be larger as well. Choke within a nominal guage is not absolute, it is the difference between the bore size whatever it may be and the choke internal size. An Invector Plus choke could well be marked Modified but measure cylinder with a conventional gauge. However that choke in the overbore Invector Plus barrel in the conventional will likely give the correct Modified patterns as marked. Bottom line - Invector Plus barrels have a bigger bore size and their chokes do as well. Most choke gauges are useless for an overbored barrel.
Falconflyer
CGN Ultra frequent flyer
I was thinking the same thing as you are Ashcroft until I reread and saw that he also checked the skeet and full chokes and found that they indicated as marked, only the mod measured cylinder.
Aftermarket chokes such as patternmaster don't always follow conventional dimensions or profiles, especially with proprietary barrels such as the Browning Invector Plus. The only way to know for sure what your theoretical degree of choke is, you need to carefully measure your bore size and your choke size then subtract the choke dimension from the bore dimension. This will give you the actual choke measurement ( usually in thousandths of an inch, such as .020"). Even many gunsmiths do not have a proper bore gauge though. In the end there are many subtle factors affecting choke, the only true evaluation of your choke in your barrel with your ammunition of choice is to run some actual pattern tests and count the pellet hits. Remember, the shotgun is not a precise firearm like a rifle is and a well distributed even pattern is more effective than one with holes or voids.
Falconflyer
CGN Ultra frequent flyer
Agreed, I've always said that the best way to indicate choke is by points of constriction!
X2, then it is up to the owner to decide what to put through them and how and when to use them. A term that represents pattern percentage is all but meaningless. The gun manufacturers have stuck with the system because at least the terms are familiar to most shotgunners. If someone asks me what my gun is choked at and I say 16 and 24 or or roughly 3/8 and 5/8 they just get a confused look on their face.
Thank you eurovw this helped and at least I could make sense of the readings on my inside mic.(had to buy new battery) This is actual dia. on the chokes I will transpose what the article indicated it should be,20g invector full - 594 actual .600 .mod-605 actual 616. skeet .612 - actual 618.So the mod choke is definitely off .I am now really curious to pattern them to see what that will look like? I also checked a couple of fixed chokes (28g & .410) on a pair of 1148 Remington skeets both were within a couple 552,.402
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Your 'Cyl masquerading as a Mod,' does it measure the same inner diameter both front and back? If it's truly a cylinder (no constriction), it really won't have any taper, no?
I guess in the end the only way to be absolutely certain is to take the gun, select a choke, get the shells you intend to shoot and head to the pattern board. (Like Ashcroft said)
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Falconflyer
CGN Ultra frequent flyer
Nothing inkballs a target like a Model 12 Trap!
Its a Browning who are more interested in window decals and seat covers than making the QUALITY GUNS of the days gone bye. Poor John Moses has spun so many times in his grave its not even funny. JUNK, Be glad they havent found a way to make the chokes out of plastic cuz thatll be next like the cheap plastic cassette triggers found in some of their rifles. But hey ,theyve got a gold trigger, Its plastic but .....
