The ABLR's don't seem to mind a jump. A buddy gave me a few 277 150 grain to try. I found 3 Federal cases that were nice and straight after full length sizing and trimming. Fed 210 primers and 55 gr R19. Measured and found they touched the lands at 3.590. This barrel is well worn! Taking great care to seat them nice and straight.No noticeable runout. Seated to 3.350. Jump .240. 3 shots at 100 yds. 1 inch group. I'm happy. Pre 64 M70 standard. 1953 manufacture I've been shooting since early 60's.
