Perusing some OLD (1973) magazines and digests, the 1973 GUN DIGEST featured an article (page 162) titled, The Little Twenty - a wildcatter's wildcat, authored by G. O. Ashley (a name I do not recall), with the tag-line, "What will a 20-caliber do that a 222 or the increasingly popular 17 won't? Nothing really, but you can get in on the ground floor development now - the field is wide open." As time has proven, the latter comment is incorrect, however, the article, if you can find it, is worth a read - if it's been done in the last 20 years, it was done LONG before . . .
The author, who made his own bullets, tested/used bullets from 28gr up to 53gr, at MV of 3737fps, as quantified by his Oehler chronograph. According to Mr. Ashley, the Germans, Swiss and Mexicans were early 20 caliber developers/experimenters, who, largely used .205" groove diameter. Mexican General Mondragon is noted to have used various case capacities and bullet weights, including a case with, "almost no neck, with shoulders even more abruptly angled to the case neck than Gibbs or
ICL". "Here, "in the States" cases from 22 Hornet, up to 250 Savage were shaped and reshaped by more readily recognizable monikers, such as Bob Forker & Fred Huntington. For 20 Cal freaks, it's a good read.
RG
The author, who made his own bullets, tested/used bullets from 28gr up to 53gr, at MV of 3737fps, as quantified by his Oehler chronograph. According to Mr. Ashley, the Germans, Swiss and Mexicans were early 20 caliber developers/experimenters, who, largely used .205" groove diameter. Mexican General Mondragon is noted to have used various case capacities and bullet weights, including a case with, "almost no neck, with shoulders even more abruptly angled to the case neck than Gibbs or
ICL". "Here, "in the States" cases from 22 Hornet, up to 250 Savage were shaped and reshaped by more readily recognizable monikers, such as Bob Forker & Fred Huntington. For 20 Cal freaks, it's a good read.

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