I loaded some 257 Roberts with the Frankford seating die.
Years ago I had a great load for this rifle. 117gr Hornady btsp over 42.8gr of H4350. But for the life of me (and my ex throwing away all of my load data notebooks) don’t remember the seating depth. I believe it was close to the lands but am not certain.
Ive loaded this load with the bullets .020” of the lands, and although it was plenty accurate enough to hunt with, it wasn’t as accurate as my original load.
So today I loaded some at .020” off the lands and then .015”, .010”, and .005” off the lands. The die worked perfectly. I moved the micrometer .005” for each load and checked each with the comparator and they were perfect. Beats the hell out of trying to adjust my 1976 vintage rcbs die each time.
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