Taken from a forum elsewhere:
(You need to Login or Register to view media files and links) Frank de Haas reviewed the Hoch action and its successor, the Hoch-Meacham action in his A Potpourri of Single Shot Rifles and Actions.
According to him, it was made by both manufacturers as a "kit" with the parts being either unpolished or polished, and the final fitting and heat treatment up to the purchaser. De Haas didn't know why this was so, but I believe Ken Bresien did the same thing on his Stevens actions to avoid the financial and liability hassles of becoming a "gun manufacturer."
If it is a Hoch, it will say "U. S. A." on the left side of the receiver, for "Uncompahgre Scheutzen Arms." Meacham's version will have his name and address. As 4060May said, the original kits were pretty crude, especially the inside fitting, and De Haas was pretty unhappy about that. He was, however, able to build a .32-40 rifle on the action. Meacham improved the fit and finish of the action parts, as well as details such as the underlever catch, which of course raised the price of the kit to $300 or so, a fair amount of money back then.
De Haas liked the design, said it was simple, effective and unlikely to go out of order. It's a big heavy action, as they go, but Hoch designed it for Scheutzen shooting with .32-40-type cartridges and low intensity loadings. He opined (and Hoch concurred) that he low sidewalls render it unfit for hot cartridges, the extractor won't work with rimless, and a cartridge with a .30-40 head size is about the limit to go into the action, even with some extra grinding and fitting.
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