Four or five years ago I bought an L46 .222 which came with several hundred rounds of Herter's factory ammunition. The boxes were very shopworn and the ammunition inside a bit dark, but with no corrosion. I've fired around 100 rounds of it in various rifles and reloaded the brass, finding it to be of top quality. Who knows what might or might not be the truth when printed on a Herter's box, but if the line "CUSTOM OFFICERS NOTE: BRASS AND BULLETS MADE IN FINLAND" is true, then the ammunition would almost necessarily be from either Lapua or Sako. I recently acquired my second Marlin 422 -- the rare one with the SS steel barrel (again, due to someone misrepresenting it as a Marlin 322 and others overlooking it.) So I thought I would check it out at the bench with some of this Herter's ammunition and also some handloads I had put together for the other 422. I did my range testing over an Oehler 35 chronograph just out of curiosity. To my surprise, three shots of the Herter's ammunition clocked 3243, 3250, & 3232 for an extreme spread of 18 fps and a standard deviation of just 9 fps, and a true corrected muzzle velocity of about 3252 fps. That's over 50 fps more than the "old" publish velocity (3,200 fps) and more than 100 fps over the current published velocity for factory loads (3140 fps). It grouped .85 inches at 100 yards out of the previously untested Marlin. My handloads with 50 grain Ballistic Tips shot an almost identical group size, just a half inch lower, and averaged 3188 fps. The handloads are a few tenths of a grain over book-recommended "maximum", but then the "book" is very conservative with the .222 as compared with the .223. Anyway, I was impressed with the performance of the old Herter's "International Match Grade, Ultra Magnum Velocity, World's Finest, Ultra Accuracy . . . et al" ammunition and the test piqued my curiosity as to whether it was actually a Sako product.