Difference in shotshells with Low brass/Low Base versus High brass/High base

#Highbrassshotshellhull, #Highbaseshotshellhull, #Lowbrassshotshellhull, #Lowbaseshotshellhull, #Highbrasslowbrass, #Highbaselowbase
#Mullerchokes, #Mullerhuntingchokes, #Mullercompetitionchokes, #Choketubes

[@toronadogofast7868]

Not sure if you put any credit into what Jack Oconner wrote in his 1964 book on shotguns, he talked with all of the major shell manufactures and game hunters. "At that time" they noticed a big difference in patterns between high and low brass. The high brass was made mostly for hunting loads with 6 pedal crimps. They didn't pattern as well.
Now I know there has been advancements in plastic and wads, but the originals are still around. The powders could have changed, screw in chokes, changes in velocity etc.
I personally spend a lot of time at the pattern board. Swapping chokes from lower to upper barrel changes the pattern. Same load can blow out or severely open up with just .001 difference in bore diameter.
I have yet to buy your chokes, because I had already upgraded before learning of them. But every one that I shoot with that has yours love them. Some have tried a lot of chokes over the years in one gun and say yours pattern the best.

[@bullet225ho]

Folks been drinking the coolaid since 1964

[@crudersphere8593]

I think he means that when all the innards (including the basewad) of two shells are the same the brass doesn't matter. That is, the internal volume and geometry needs to be the same. This is more relevant to handloaders, as we have the option of brass height when buying any given brand of hull. That is, if I have 2 identical Cheddite brand hulls, the only difference being the height of the brass, will preform the same if loaded identically. Often when you buy a load from the store the innards of a "hi brass" and a "low brass" load are not the same (even if the hull geometry is), thus you will get different patterns (simply because it is a different load). Way back in the day of paper hulls, there was a difference based on the brass. The height was increased to prevent pinholes from being burned through the paper (and leaking gas) in high pressure loads. This is not necessary anymore because the plastic does not burn through.
This is supported by Lyman's 5th edition shot shell loading manual (2007) and other handloading manuals.