The H&R T48s were tested extensively, and in a few cases, even tested against T44s, but these were not for "adoption" testing, i.e., the results were not used to decide what rifle wins the big production prize, but as "how well are we doing in converting the drawings?" type testing. In these tests the T44 was used as a control as the Army had access to T44 of the latest configuration, but may or may not have had Belgian produced T48s of the latest configuration. One must recall that after each trial, both weapon types were returned to their respective manufacturers with a laundry list of the failings and recommended improvements. H&R's efforts were less than stellar due to the poor state of the drawing conversions, in one case the bore diameter was wrong, and a whole lot of barrels was made wrong. Some of this (well, maybe a lot of this) can be blamed on High Standard, as they were contracted to convert the drawings from FN metric standard to MIL-STD-100 standard, they were slow to produce drawings, and apparently when they were told to hurry up, they became sloppy. Reports of just converting the dimensions and tolerances from millimeters to inches, carried to five places, not switching from first to third angle projection, and other short-cuts have been recorded. In one case they managed to gather copies of T44s, FN T48s, 2 versions of H&R T48s and a few UK FALs to test all together. This report states that only the T44 and FN made rifles were suitable for Army use. (To be fair the UK FAL was, other than the British sand cuts, the same as an earlier FN T48 and didn't have many of the latest fixes to known deficiencies.) (Evaluation of Lightweight Rifles, CONARC 29 May 1956) Other reports worth looking for: Evaluations of Lightweight Rifles and Ammunition A Comparison Test of United Kingdom and United States Lightweight Rifles A Comparison Test of United Kingdom and United States Ammunition for Lightweight Weapons Service Test of Lightweight Rifles Rifle, Caliber .30, Lightweight, T48 U.S. Rifle, Caliber .30, Lightweight, T48, Technical Report U.S. Rifle, Caliber .30, T48 - Accuracy Improvement A Test of Rifles, Caliber .30, T44A4 and T48 A Test of Rifles, Caliber .30 T48 and T48A1 Manufactured by Fabrique Nationale d'Arms de Guerre Development of the Caliber .30 Rifle, T48 Series One of these details High Standard's involvement, and I believe the first three include the EM2 and T25.