In discussions on this board of blown shotguns one often reads mention of factory ammo loaded to SAAMI vs CIP regs vs "low pressure" reloads. There is actually a 4th class of chamber pressures, what I will call "hot latino" loads. Here I include at least one Rio and one South American loaded Imperials, both in 67 mm 16 gauge hulls. In two instances, when submitted for measurement of chamber pressures and near-muizzle velocities, pressures were in 12000++ psi range and velocities about 1400 fps. How common are these high pressure loads?
At various times I have seen 12, 16 and 20 gauge Rio target ammo at attractive prices at trap and skeet clubs. Did all these Rio ammos also produce such high chamber pressures? Anyone have instrument pressures and velocities for Rio 12 and 20 gauge loads. They were sure popular. I also have reason to think (but not to conclude) that both Rio and South American Imperial shotshells are provided to foreign dove shooters enjoying those thousands-of-rounds-per-weekend shoots. Just how many of these "bullet proof", high dollar trap guns were subjected to unknown thousands of these hot latino loads?
Once one gets away from areas where shooters are native English speakers or Central Europeans, what is record of blown target shotguns and what are typical chamber pressures of factory ammos?
Niklas
