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Rifles, Reloading, Optics, Equipment
Shotguns
Patternmaster chokes
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<blockquote data-quote="BillR" data-source="post: 601911" data-attributes="member: 462"><p>What there is are small protrusions inside the choke (Hope I am explaining this right) that actually slow down the wad letting the shot actually move ahead of the wad just a bit so that the shot is not squeezed down by the constriction of the choke squeezing the wad with the shot inside. This is done to keep the shot in a more uniform group. Choke constriction causes a lot of problems with patterns due to the load slamming into it at 1200 to 1500 fps with no give so to speak. </p><p>Heavy shot does not like a lot of constriction due to this. The best way to see what your choke is actually doing is to use a Steel patterning board. Get a 40" square of 1/8" steel plate and a bucket of white grease and a paint brush to smear on a thin layer of grease. It can be reused and reused this way. I like to have a 1.5" hole cut in the center for an aiming point. Shoot it and look at your hits. Hits show up very well in the grease. Just take the brush and wipe out the hits and your ready for the next shot. Works best mounted permanently or else you have a greasy mess on your hands.</p><p>Also the larger the shot the harder the transition through your choke and the more open the choke needs to be. My most used choke for heavy shot is an IC choke. Even a Cyl choke does well with Hevi Shot. Also if your pattern shows that the load is not right for the choke don't give up, just change your shot size and see which one it likes. If you can't find a load it likes within the range of shot size your looking for just change chokes and start over again. Shotguns are a bit more forgiving than a rifle but do have loads they like and loads they don't.</p></blockquote><p></p>
[QUOTE="BillR, post: 601911, member: 462"] What there is are small protrusions inside the choke (Hope I am explaining this right) that actually slow down the wad letting the shot actually move ahead of the wad just a bit so that the shot is not squeezed down by the constriction of the choke squeezing the wad with the shot inside. This is done to keep the shot in a more uniform group. Choke constriction causes a lot of problems with patterns due to the load slamming into it at 1200 to 1500 fps with no give so to speak. Heavy shot does not like a lot of constriction due to this. The best way to see what your choke is actually doing is to use a Steel patterning board. Get a 40" square of 1/8" steel plate and a bucket of white grease and a paint brush to smear on a thin layer of grease. It can be reused and reused this way. I like to have a 1.5" hole cut in the center for an aiming point. Shoot it and look at your hits. Hits show up very well in the grease. Just take the brush and wipe out the hits and your ready for the next shot. Works best mounted permanently or else you have a greasy mess on your hands. Also the larger the shot the harder the transition through your choke and the more open the choke needs to be. My most used choke for heavy shot is an IC choke. Even a Cyl choke does well with Hevi Shot. Also if your pattern shows that the load is not right for the choke don't give up, just change your shot size and see which one it likes. If you can't find a load it likes within the range of shot size your looking for just change chokes and start over again. Shotguns are a bit more forgiving than a rifle but do have loads they like and loads they don't. [/QUOTE]
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