Just a wee bit of history that may help some folks with the Hogdon/IMR stuff.

IMR was a development and product of Dupont. Exactly where it was made/is made may differ, but IMR XXXX cannister (consumer grade powder) will be the same regardless of where it was made.

Hogdon got their start repackaging surplus military powders after WWII. Their first product was 4831 [Which was produced by Dupont for the military under exlusive contract. Original load data for 4831 didn't specify a maker because it was only available from Hogdon. When Dupont decided there was a market for it, they reformulated it slightly and IMR 4831 was born.]. Hogdon later obtained other surplus powders of various types, labeled it as Hogdon whatever and sold that, frequently with load data generated by Hogdon.

When they got more successful, Hogdon imported other powders and/or had powders made to match their specifications.

Note: one of the primary reasons Hogdon and IMR powders of the same/similar type (IMR4198/H4198 or IMR4227/H4227) have different load data is that the original Hogdon powders were not the cannister grade powders with consistent burn rates that IMR sells on the consumer market. [Non cannister powders (like Federal, Remington and Winchester load with) must have each batch tested for burn rate and load data changed to match.] Hogdon blended the available batches of non cannister powders to reach a specific burn rate (created a cannister grade powder) which was similar but different from the original Dupont products.